Warrior's Outpost

Warrior Outpost enter the battlefield tapped.
{t}: Add {w}, {r}, or {g} to your mana pool
{2}{w}{r}{g}{t}: Sacrifice Warrior Outpost:
Put target Beast or Warrior card from your
hand onto the battlefield.
"When our warriors are not out spreading
gore, they are resting here and preparing
for the next attack."