Matter Reshaper
Creature — Eldrazi
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.
Chris Rahn
Commander Masters (CMM)
• #806Rulings
If you don’t put the card onto the battlefield for any reason, you put the card into your hand.
(wotc • 2016-01-22)
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.
(wotc • 2016-01-22)
Rulings
If you don’t put the card onto the battlefield for any reason, you put the card into your hand.
(wotc • 2016-01-22)
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.
(wotc • 2016-01-22)