Alatreon

Flying, hexproof, indestructible
Alatreon can't attack or block.
{u}{b}{r}{g}: Alatreon loses all other abilities until
end of turn and gains trample, haste and
"whenever a player is dealt combat damage
by Alatreon, for each point of damage dealt
this way, that player sacrifices
a noncreature permanent, unless
they discard a card."