Arcane Levitator (Thaumcraft 4)

The Arcane Levitator is a block added by Thaumcraft 4. If a player/creature stands above the block, they will float up to 10 blocks into the air. Sneaking will allow the player (or creature) to levitate slowly downwards.

Arcane Levitators can be "stacked". Putting an Arcane Levitator atop another Arcane Levitator will allow mobs to float up to 20 blocks instead of the normal 10, while three Arcane Levitators will allow 30 blocks, four 40, etc. The Arcane Levitator's functions will be deactivated when powered by a Redstone signal.