Whenever you cast your first spell each turn, choose an opponent at random. Vial Smasher deals damage equal to that spell's mana value to that player or a planeswalker that player controls. Partner
Body Thief — When you cast this spell, you may exile a creature you control and put a takeover counter on it. You may have The Master enter as a copy of a creature card in exile with a takeover counter on it.
Whenever you cast a Spirit or Arcane spell, you may put a ki counter on this artifact. {2}, {T}, Remove a ki counter from this artifact: Create a 1/1 colorless Spirit creature token.
Vigilance {1}, {T}: Draw a card, then discard a card. Whenever you discard one or more artifact cards, create a tapped Powerstone token. This ability triggers only once each turn.
Vigilance Whenever another creature you control enters, Leaf-Leap Guide and that creature perpetually get +1/+1. {1}, {T}: Return another target creature you control to its owner's hand.
"Then inch by inch out of the grass rose up the head and spread hood of Nag, the big black cobra, and he was five feet long from tongue to tail." —Rudyard Kipling, The Jungle Books
Kagemaro's power and toughness are each equal to the number of cards in your hand. {B}, Sacrifice Kagemaro: All creatures get -X/-X until end of turn, where X is the number of cards in your hand.
Reveal the top X plus one cards of your library and separate them into two piles. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard.