Soulblade Corrupter #17

Jun 8, 2018

"Partner with [name]" represents two abilities. The first is a triggered ability: "When this permanent enters the battlefield, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle their library."

Jun 8, 2018

A nonlegendary creature can't be your commander, even if it has a "partner with" ability.

Jun 8, 2018

Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text.

Jun 8, 2018

Soulblade Corrupter's last ability will trigger if a creature an opponent controls with a +1/+1 counter on it attacks another player who's also your opponent.

Jun 8, 2018

Soulblade Corrupter's last ability won't trigger if a creature attacks a planeswalker.

Jun 8, 2018

Soulblade Corrupter's last ability won't trigger if a creature without any +1/+1 counters on it attacks and receives a +1/+1 counter any time after attacking.