Gideon, Ally of Zendikar [Battle for Zendikar Prerelease Promos] 276 It has "Sacrifice this creature:

It has "Sacrifice this creature: This creature deals 1 damage to any target

Set: Invasion Type: Land Rarity: Uncommon Coastal Tower enters the battlefield tapped

Set: Eternal Masters Type: Artifact Rarity: Rare Cost: {1} {1}: Look at the top three cards of your library

where Heidar's frigid sway is strongest

Gideon, Ally of Zendikar [Battle for Zendikar Prerelease Promos] 276 It has "Sacrifice this creature:Set: Battle for Zendikar Prerelease Promos Type: Legendary Planeswalker Gideon Rarity: Mythic Cost: {2}{W}{W} +1: Until end of turn, Gideon, Ally of Zendikar becomes a 5 5 Human Soldier Ally creature with indestructible that's still a planeswalker. Prevent all damage that would be dealt to him this turn. 0: Create a 2 2 white Knight Ally creature token. 4: You get an emblem with "Creatures you control get +1 +1."