The Mightstone and Weakstone (version #2) 4 Legendary Artifact Powerstone When CARDNAME enters the battlefield, choose one Create two 1/1 colorless Soldier artifact creature tokens
The key is to have tons of other removal to pair with this, especially cheap removal like Fire Magic and Thunder Magic
Sneak Attack Being one of the most feared win conditions in Legacy, Sneak Attack allows you to cheat massive threats like Emrakul, the Aeons Torn or Atraxa, Grand Unifier onto the battlefield for a single red mana
Ponder, if you will, this paragraph
Tarkir: Dragonstorm - Harmonize Winner: Nature's RhythmNature's Rhythm Runner-up: Zenith FestivalZenith Festival Harmonize is a strict upgrade over flashback: both mechanics allow the player to re-cast a spell from their graveyard (and then exile it) by paying a certain cost, but only the latest version also allows them to tap a creature to discount the spell by an amount of generic mana equal to the tapped creature's power
Pokmon, YuGiOh