Its powers are simple—mind over matter. Or rather, an immeasurable mind disassembling and reconfiguring matter.

Matter Reshaper

({C} represents colorless mana.)
When this creature dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with mana value 3 or less. Otherwise, put that card into your hand.

Commander Masters

When Matter Reshaper dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with mana value 3 or less. Otherwise, put that card into your hand.

Explorer Anthology 2

Secret Lair Drop

Oath of the Gatewatch

({C} represents colorless mana.)
When Matter Reshaper dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with converted mana cost 3 or less. Otherwise, put that card into your hand.

Oath of the Gatewatch Promos

If you don’t put the card onto the battlefield for any reason, you put the card into your hand.

If you put an Aura card onto the battlefield this way, you choose what it enchants as it enters the battlefield. You must be able to choose a legal player or permanent or you can’t put the Aura onto the battlefield.