diff --git a/go.mod b/go.mod
index 9b265ff..0efc336 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ go 1.20
 replace github.com/sandertv/gophertunnel => github.com/olebeck/gophertunnel v1.28.2-1
 
 //replace github.com/df-mc/dragonfly => ./dragonfly
-replace github.com/df-mc/dragonfly => github.com/olebeck/dragonfly v0.9.4-11
+replace github.com/df-mc/dragonfly => github.com/olebeck/dragonfly v0.9.4-12
 
 //replace gioui.org => ./gio
 replace gioui.org => github.com/olebeck/gio v0.0.0-20230427194143-c9c9d8bc704d
diff --git a/go.sum b/go.sum
index f51b80a..72cf04e 100644
--- a/go.sum
+++ b/go.sum
@@ -87,6 +87,8 @@ github.com/nicksnyder/go-i18n/v2 v2.2.1 h1:aOzRCdwsJuoExfZhoiXHy4bjruwCMdt5otbYo
 github.com/nicksnyder/go-i18n/v2 v2.2.1/go.mod h1:fF2++lPHlo+/kPaj3nB0uxtPwzlPm+BlgwGX7MkeGj0=
 github.com/olebeck/dragonfly v0.9.4-11 h1:FkDKWUT1Kz6WRRxCLmCcFsZiocu9/htkyyEfTgKaVio=
 github.com/olebeck/dragonfly v0.9.4-11/go.mod h1:1XIP+EcgRnxAEkFEbqZE3T4vXyMufzdpnigwczMBbyo=
+github.com/olebeck/dragonfly v0.9.4-12 h1:jiD3Nr5SA/Asj6bdePAx25uMBkyUr9jxAwbjODHYgKM=
+github.com/olebeck/dragonfly v0.9.4-12/go.mod h1:1XIP+EcgRnxAEkFEbqZE3T4vXyMufzdpnigwczMBbyo=
 github.com/olebeck/gio v0.0.0-20230427194143-c9c9d8bc704d h1:D+Ryca52xv37/p0FsEWfGwAGUZ1vPWpvimA2eMfBijc=
 github.com/olebeck/gio v0.0.0-20230427194143-c9c9d8bc704d/go.mod h1:8CFQM/4LurRd9G3NUYdacFb9j2pK0LrAyVO2mAZo4mw=
 github.com/olebeck/gophertunnel v1.28.2-1 h1:+3LaX37suEjMUnUTUKJMetoBqSg5PUkUBJc5dW02WI4=
diff --git a/handlers/second-user/provider.go b/handlers/second-user/provider.go
index 91d1be8..ce6e179 100644
--- a/handlers/second-user/provider.go
+++ b/handlers/second-user/provider.go
@@ -5,7 +5,6 @@ import (
 
 	"github.com/df-mc/dragonfly/server/block/cube"
 	"github.com/df-mc/dragonfly/server/world"
-	"github.com/df-mc/dragonfly/server/world/chunk"
 	"github.com/google/uuid"
 )
 
@@ -38,27 +37,12 @@ func (p *provider) SavePlayerSpawnPosition(uuid uuid.UUID, pos cube.Pos) error {
 	return nil
 }
 
-func (p *provider) LoadChunk(position world.ChunkPos, dim world.Dimension) (c *chunk.Chunk, exists bool, err error) {
-	c, ok := p.s.chunks[position]
-	return c, ok, nil
+func (p *provider) LoadColumn(pos world.ChunkPos, dim world.Dimension) (*world.Column, error) {
+	return &world.Column{
+		Chunk: p.s.chunks[pos],
+	}, nil
 }
 
-func (p *provider) SaveChunk(position world.ChunkPos, c *chunk.Chunk, dim world.Dimension) error {
-	return nil
-}
-
-func (p *provider) LoadEntities(position world.ChunkPos, dim world.Dimension, reg world.EntityRegistry) ([]world.Entity, error) {
-	return nil, nil
-}
-
-func (p *provider) SaveEntities(position world.ChunkPos, entities []world.Entity, dim world.Dimension) error {
-	return nil
-}
-
-func (p *provider) LoadBlockNBT(position world.ChunkPos, dim world.Dimension) ([]map[string]any, error) {
-	return nil, nil
-}
-
-func (p *provider) SaveBlockNBT(position world.ChunkPos, data []map[string]any, dim world.Dimension) error {
+func (p *provider) StoreColumn(pos world.ChunkPos, dim world.Dimension, col *world.Column) error {
 	return nil
 }
diff --git a/handlers/worlds/chunk.go b/handlers/worlds/chunk.go
index d1326fb..a93523f 100644
--- a/handlers/worlds/chunk.go
+++ b/handlers/worlds/chunk.go
@@ -48,7 +48,7 @@ func (w *worldsHandler) processLevelChunk(pk *packet.LevelChunk) {
 		w.worldState.blockNBTs[protocol.BlockPos{x, y, z}] = blockNBT
 	}
 
-	w.worldState.chunks[pk.Position] = ch
+	w.worldState.chunks[(world.ChunkPos)(pk.Position)] = ch
 
 	max := w.worldState.dimension.Range().Height() / 16
 	switch pk.SubChunkCount {
@@ -76,20 +76,20 @@ func (w *worldsHandler) processLevelChunk(pk *packet.LevelChunk) {
 			return sub.Empty()
 		})(ch.Sub())
 		if !empty {
-			w.mapUI.SetChunk(pk.Position, ch, true)
+			w.mapUI.SetChunk((world.ChunkPos)(pk.Position), ch, true)
 		}
 	}
 }
 
 func (w *worldsHandler) processSubChunk(pk *packet.SubChunk) {
-	posToRedraw := make(map[protocol.ChunkPos]bool)
+	posToRedraw := make(map[world.ChunkPos]bool)
 
 	for _, sub := range pk.SubChunkEntries {
 		var (
 			absX = pk.Position[0] + int32(sub.Offset[0])
 			absY = pk.Position[1] + int32(sub.Offset[1])
 			absZ = pk.Position[2] + int32(sub.Offset[2])
-			pos  = protocol.ChunkPos{absX, absZ}
+			pos  = world.ChunkPos{absX, absZ}
 		)
 		ch, ok := w.worldState.chunks[pos]
 		if !ok {
@@ -137,7 +137,7 @@ func (w *worldsHandler) ProcessChunkPackets(pk packet.Packet) packet.Packet {
 		w.worldState.blockNBTs[pk.Position] = pk.NBTData
 	case *packet.UpdateBlock:
 		if w.settings.BlockUpdates {
-			cp := protocol.ChunkPos{pk.Position.X() >> 4, pk.Position.Z() >> 4}
+			cp := world.ChunkPos{pk.Position.X() >> 4, pk.Position.Z() >> 4}
 			c, ok := w.worldState.chunks[cp]
 			if ok {
 				x, y, z := blockPosInChunk(pk.Position)
@@ -147,7 +147,7 @@ func (w *worldsHandler) ProcessChunkPackets(pk packet.Packet) packet.Packet {
 		}
 	case *packet.UpdateSubChunkBlocks:
 		if w.settings.BlockUpdates {
-			cp := protocol.ChunkPos{pk.Position.X(), pk.Position.Z()}
+			cp := world.ChunkPos{pk.Position.X(), pk.Position.Z()}
 			c, ok := w.worldState.chunks[cp]
 			if ok {
 				for _, bce := range pk.Blocks {
diff --git a/handlers/worlds/map_item.go b/handlers/worlds/map_item.go
index 4ae6a56..9d644ea 100644
--- a/handlers/worlds/map_item.go
+++ b/handlers/worlds/map_item.go
@@ -13,6 +13,7 @@ import (
 	"github.com/go-gl/mathgl/mgl32"
 	"golang.design/x/lockfree"
 
+	"github.com/df-mc/dragonfly/server/world"
 	"github.com/df-mc/dragonfly/server/world/chunk"
 	"github.com/sandertv/gophertunnel/minecraft/protocol"
 	"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
@@ -262,8 +263,8 @@ func (m *MapUI) ToImage() *image.RGBA {
 	return img
 }
 
-func (m *MapUI) SetChunk(pos protocol.ChunkPos, ch *chunk.Chunk, complete bool) {
-	m.renderQueue.Enqueue(&RenderElem{pos, ch})
+func (m *MapUI) SetChunk(pos world.ChunkPos, ch *chunk.Chunk, complete bool) {
+	m.renderQueue.Enqueue(&RenderElem{(protocol.ChunkPos)(pos), ch})
 	m.SchedRedraw()
 }
 
diff --git a/handlers/worlds/world.go b/handlers/worlds/world.go
index 3713fd9..aa97ef5 100644
--- a/handlers/worlds/world.go
+++ b/handlers/worlds/world.go
@@ -54,7 +54,7 @@ type WorldSettings struct {
 
 type worldState struct {
 	dimension          world.Dimension
-	chunks             map[protocol.ChunkPos]*chunk.Chunk
+	chunks             map[world.ChunkPos]*chunk.Chunk
 	blockNBTs          map[protocol.BlockPos]map[string]any
 	entities           map[uint64]*entityState
 	openItemContainers map[byte]*itemContainer
@@ -218,7 +218,7 @@ func (w *worldsHandler) currentName() string {
 func (w *worldsHandler) Reset() {
 	w.worldState = worldState{
 		dimension:          w.worldState.dimension,
-		chunks:             make(map[protocol.ChunkPos]*chunk.Chunk),
+		chunks:             make(map[world.ChunkPos]*chunk.Chunk),
 		blockNBTs:          make(map[protocol.BlockPos]map[string]any),
 		entities:           make(map[uint64]*entityState),
 		openItemContainers: make(map[byte]*itemContainer),
@@ -228,11 +228,11 @@ func (w *worldsHandler) Reset() {
 }
 
 func (w *worldState) cullChunks() {
-	keys := make([]protocol.ChunkPos, 0, len(w.chunks))
+	keys := make([]world.ChunkPos, 0, len(w.chunks))
 	for cp := range w.chunks {
 		keys = append(keys, cp)
 	}
-	for _, cp := range fp.Filter(func(cp protocol.ChunkPos) bool {
+	for _, cp := range fp.Filter(func(cp world.ChunkPos) bool {
 		return !fp.Some(func(sc *chunk.SubChunk) bool {
 			return !sc.Empty()
 		})(w.chunks[cp].Sub())
@@ -250,32 +250,25 @@ func (w *worldState) Save(folder string) (*mcdb.DB, error) {
 		return nil, err
 	}
 
-	// save chunk data
-	for cp, c := range w.chunks {
-		provider.SaveChunk((world.ChunkPos)(cp), c, w.dimension)
-	}
-
-	// save block nbt data
 	chunkBlockNBT := make(map[world.ChunkPos][]map[string]any)
 	for bp, blockNBT := range w.blockNBTs { // 3d to 2d
 		cp := world.ChunkPos{bp.X() >> 4, bp.Z() >> 4}
 		chunkBlockNBT[cp] = append(chunkBlockNBT[cp], blockNBT)
 	}
-	for cp, blockNBT := range chunkBlockNBT {
-		err = provider.SaveBlockNBT(cp, blockNBT, w.dimension)
-		if err != nil {
-			logrus.Error(err)
-		}
-	}
 
-	// save entities
 	chunkEntities := make(map[world.ChunkPos][]world.Entity)
 	for _, es := range w.entities {
 		cp := world.ChunkPos{int32(es.Position.X()) >> 4, int32(es.Position.Z()) >> 4}
 		chunkEntities[cp] = append(chunkEntities[cp], es.ToServerEntity())
 	}
-	for cp, v := range chunkEntities {
-		err = provider.SaveEntities(cp, v, w.dimension)
+
+	// save chunk data
+	for cp, c := range w.chunks {
+		column := &world.Column{
+			Chunk:    c,
+			Entities: chunkEntities[cp],
+		}
+		err = provider.StoreColumn(cp, w.dimension, column)
 		if err != nil {
 			logrus.Error(err)
 		}