Aetherstorm Roc [Kaladesh] Elf Scout Set: Guilds of Ravnica Type:

Set: Guilds of Ravnica Type: Creature — Zombie Knight Rarity: Rare Cost: {2}{B} Whenever a nontoken creature you control dies

Set: Kaladesh Promos Type: Artifact Creature — Construct Rarity: Uncommon Cost: {3} Other artifact creatures you control get +1/+1

Set: Commander 2016 Type: Creature — Human Warrior Rarity: Rare Cost: {1}{G} Creatures with power less than Den Protector's power can't block it

The best way to calm a rampaging ceratok is to wait until it dies of natural causes

Aetherstorm Roc [Kaladesh] Elf Scout Set: Guilds of Ravnica Type:Set: Kaladesh Type: Creature Bird Rarity: Rare Cost: {2}{W}{W} Flying Whenever Aetherstorm Roc or another creature enters the battlefield under your control, you get {E} (an energy counter). Whenever Aetherstorm Roc attacks, you may pay {E}{E}. If you do, put a +1 +1 counter on it and tap up to one target creature defending player controls.