Altar's Reap [Conspiracy] Centaur Spellshaper I've seen some crazy ones

I've seen some crazy ones

Set: Modern Masters 2015 Type: Creature — Human Wizard Rarity: Mythic Cost: {1}{B} At the beginning of your upkeep

Whenever you cast a spell of the chosen type

head cocked as if straining to hear some distant sound

Set: Unstable Type: Creature — Goblin Rigger Rarity: Rare Cost: {3}{R}{R} When Steamflogger of the Month enters the battlefield

Altar's Reap [Conspiracy] Centaur Spellshaper I've seen some crazy onesSet: Conspiracy Type: Instant Rarity: Common Cost: {1}{B} As an additional cost to cast this spell, sacrifice a creature. Draw two cards. "Don't worry, your death will be as informative as possible." Gorghul, augur of skulls