Whenever you cast an instant or sorcery spell, you may exile that card instead of putting it anywhere else as it resolves. At the beginning of your upkeep, Clash Reactor deals X damage to each opponent, where X is the number of colors of cards exiled with Clash Reactor.
Haste When Collapsing Star Viper enters, you may tap target permanent with mana value X or less. At the beginning of your upkeep, return Collapsing Star Viper to its owner's hand.
{T}: Add one mana of any color. Augmented — Whenever a nontoken creature you control enters, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on it.
Put a +1/+1 counter on target creature you control. It can't be blocked by more than one creature this turn. Whenever a creature you control attacks alone, return Come Out and Play from your graveyard to your hand.
This spell costs {X} less to cast, where X is the greatest power among creatures you control. Tap up to three target creatures. They don't untap during their controller's next untap step.
When Crystal Vision Abomination enters, create a 1/1 blue Elemental creature token with flying. Whenever an Elemental you control attacks, that creature gets +1/+0 and first strike until end of turn.
Target player sacrifices a creature or planeswalker. Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)