Tyranitar ex (99/101) (Delta Species) [EX: Dragon Frontiers] Goblin Berserker Set: Commander 2013 Type: Artifact

Set: Commander 2013 Type: Artifact Rarity: Rare Cost: {3} You may activate abilities of creatures you control as though those creatures had haste

Shatterskull Pass is a pretty distant second

Set: Judge Gift Cards 2011 Type: Enchantment Rarity: Rare Cost: {4}{G} If an effect would create one or more tokens under your control

Set: Invasion Promos Type: Creature — Kavu Rarity: Rare Cost: {1}{R}{G} Flash

destroy any monster this card attacks at the end of the Damage Step

Tyranitar ex (99/101) (Delta Species) [EX: Dragon Frontiers] Goblin Berserker Set: Commander 2013 Type: ArtifactSet: EX: Dragon Frontiers Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless,Colorless,Colorless