Hunters of Life

When Hunters of Life enters the battlefield,
create a token copy of it. Every upkeep, double
the amount of tokens on the battlefield.
Haste, Flying, Deathtouch
{5}{p/r}{p/b}: Add ten {r} to your mana pool.
If you control a Swamp or a Swamp is in your
graveyard, each player sacrifices ten permanents
from the battlefield. All creatures you control
gain haste and attack this turn.