While its stats aren't much to write home about, thanks to its Landfall ability, whenever a land enters the battlefield under its owner's control, its owner may gain control of the target creature for as long as Roil Elemental remains in play
Since you can forcefully rest your opponent's cards, if they attempt to play a high-cost Character, your "OP04-031 Donquixote Doflamingo" will be ready to hold them down.
That being said, all the best red token generators can be roughly grouped into: Those that create Treasures, Those that create a copy of a creature you control, usually exiling or sacrificing it at the end of combat or end of turn, Those that spawn 1/1 creature tokens, Those that create some really big dragons
Grand Arbiter Augustin IV this is a fun card, reduce the cost of your own spells while taxing your opponents
For the Gruul, bone-crushing rage is the first priority
(4/15/2013) The top card of your library isn't in your hand, so you can't suspend it, cycle it, discard it, or activate any of its activated abilities