Infernal Shrine

Infernal Shrine enters the battlefield under
nobody's control. (Marshall searches his library
for a basic land card, reveals it, puts it onto the
battlefield, then shuffles.)
At the beginning of each players upkeep, they
create a 1/1 colorless Guardian creature token.
Whenever a creature dies, the player who killed
that creature gets a shrine counter. (Figure it out.)
When a player has forty or more shrine counters, sacrifice Infernal Shrine and they create a 10/10 colorless Pun