Odin

Trample, Indestructible
Whenever Odin would be removed from play for
any reason, instead tap it, and put three kill
counters on it. While a kill counter remains on
Odin, it cannot attack or block, and does not
count as a creature in play for other card effects.
Discard a card: Remove a kill counter on
Odin. You cannot use this more than once per
turn.