Santa, King of the Hunt

First strike, haste
Whenever Santa, King of the Hunt attacks,
defending player flips a coin. If they win the flip,
they create a colorless Treasure artifact token
with "{t}, Sacrifice this artifact: Add one mana of
any color." and Santa assigns no combat damage
this combat. Otherwise Santa gains double strike
and trample until end of turn.
"Ho ho ho, who wants to get a present?"