Helm of Chatzuk [Summer Magic / Edgar] Mirrodin And many of the devils

And many of the devils We also made obedient to him

Set: Amonkhet Invocations Type: Sorcery Rarity: Mythic Cost: {B} Target player reveals their hand

Set: IDW Comics 2013 Type: Instant Rarity: Rare Cost: {U} Until end of turn

where X is the number of Mountains you control

the inhabitants of the Ivory Tower reward those who sacrifice power for knowledge

Helm of Chatzuk [Summer Magic / Edgar] Mirrodin And many of the devilsSet: Summer Magic Edgar Type: Artifact Rarity: Rare Cost: {1} {1}, {T}: Target creature gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)