Chalice of the Void [Masters 25] Battle for Zendikar Tokens It can't block as long

It can't block as long as it has a +1/+1 counter on it

then puts all cards they exiled this way onto the battlefield

Set: Commander 2014 Type: Creature — Human Assassin Rarity: Uncommon Cost: {2}{B}{B} First strike

{T}: Return Mtenda Griffin to its owner's hand and return target Griffin card from your graveyard to your hand

Chalice of the Void [Masters 25] Battle for Zendikar Tokens It can't block as longSet: Masters 25 Type: Artifact Rarity: Mythic Cost: {X}{X} Chalice of the Void enters the battlefield with X charge counters on it. Whenever a player casts a spell with converted mana cost equal to the number of charge counters on Chalice of the Void, counter that spell.