Pegasi can walk on powdered snow

src/main/java/com/minelittlepony/unicopia/mixin/MixinPowderSnowBlock.java

@@ -0,0 +1,22 @@
+package com.minelittlepony.unicopia.mixin;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import com.minelittlepony.unicopia.Race;
+import com.minelittlepony.unicopia.entity.player.Pony;
+
+import net.minecraft.block.PowderSnowBlock;
+import net.minecraft.entity.Entity;
+
+@Mixin(PowderSnowBlock.class)
+abstract class MixinPowderSnowBlock {
+    @Inject(method = "canWalkOnPowderSnow", at = @At("HEAD"), cancellable = true)
+    private static void onCanWalkOnPowderSnow(Entity entity, CallbackInfoReturnable<Boolean> info) {
+        if (Pony.of(entity).map(Pony::getSpecies).filter(Race::canFly).isPresent()) {
+            info.setReturnValue(true);
+        }
+    }
+}

src/main/resources/unicopia.mixin.json

@@ -22,6 +22,7 @@
     "MixinMobEntity",
     "MixinPersistentProjectileEntity",
     "MixinPlayerEntity",
+    "MixinPowderSnowBlock",
     "MixinProjectileEntity",
     "MixinReachDistanceFix",
     "MixinServerPlayerEntity",