diff --git a/src/lib/nbt.cpp b/src/lib/nbt.cpp
index 97a1a9d..676f45e 100644
--- a/src/lib/nbt.cpp
+++ b/src/lib/nbt.cpp
@@ -873,7 +873,8 @@ namespace NBT {
             }
             Helper::writeInt32(rawData, this->tags.size());
 
-            for (int32_t i=0; i<this->tags.size(); i++) {
+            // unsigned integer bc of compiler warning (shouldn't matter)
+            for (uint32_t i=0; i<this->tags.size(); i++) {
                 ErrorOrVoid result = this->tags.at(i)->serializeWithoutHeader(rawData);
                 if (result.isError) {
                     return result;
@@ -884,28 +885,47 @@ namespace NBT {
         }
 
         ErrorOr<Generic*> List::getElementPointer(uint64_t position) {
-            #pragma message("TODO: Implement.")
-            return ErrorOr<Generic*>(true, ErrorCodes::UNIMPLEMENTED);
+            if (this->tags.size() <= position) {
+                return ErrorOr<Generic*>(true, ErrorCodes::OUT_OF_RANGE);
+            }
+            return ErrorOr<Generic*>(this->tags.at(position));
         }
 
-        ErrorOrVoid List::setElementPointerAt(uint64_t position, Generic*) {
-            #pragma message("TODO: Implement.")
-            return ErrorOrVoid(true, ErrorCodes::UNIMPLEMENTED);
+        ErrorOrVoid List::setElementPointerAt(uint64_t position, Generic* pointer) {
+            if (this->tags.size() <= position) {
+                return ErrorOrVoid(true, ErrorCodes::OUT_OF_RANGE);
+            }
+
+            if (pointer->getTagType() != this->containedType) {
+                return ErrorOrVoid(true, ErrorCodes::INVALID_TYPE);
+            }
+
+            delete this->tags[position];
+            this->tags[position] = pointer;
+            return ErrorOrVoid();
         }
 
-        ErrorOrVoid List::appendPointer(Generic*) {
-            #pragma message("TODO: Implement.")
-            return ErrorOrVoid(true, ErrorCodes::UNIMPLEMENTED);
+        ErrorOrVoid List::appendPointer(Generic* pointer) {
+            if (pointer->getTagType() != this->containedType) {
+                return ErrorOrVoid(true, ErrorCodes::INVALID_TYPE);
+            }
+
+            this->tags.push_back(pointer);
+
+            return ErrorOrVoid();
         }
 
         ErrorOrVoid List::deleteElement(uint64_t position) {
             #pragma message("TODO: Implement.")
+
+            // Step 1) delete pointer
+            // Step 2) remove element from vector
+
             return ErrorOrVoid(true, ErrorCodes::UNIMPLEMENTED);
         }
 
         uint64_t List::length() {
-            #pragma message("TODO: Implement.")
-            return 0;
+            return this->tags.size();
         }
     }
 
diff --git a/src/lib/nbt.hpp b/src/lib/nbt.hpp
index 2938c14..ed3993c 100644
--- a/src/lib/nbt.hpp
+++ b/src/lib/nbt.hpp
@@ -235,8 +235,8 @@ namespace NBT {
                 ErrorOrVoid serializeWithoutHeader(std::vector<uint8_t>* rawData) override;
 
                 ErrorOr<Generic*> getElementPointer(uint64_t position);
-                ErrorOrVoid setElementPointerAt(uint64_t position, Generic*);
-                ErrorOrVoid appendPointer(Generic*);
+                ErrorOrVoid setElementPointerAt(uint64_t position, Generic* pointer);
+                ErrorOrVoid appendPointer(Generic* pointer);
                 ErrorOrVoid deleteElement(uint64_t position);
                 uint64_t length();
         };