Legitimoose

Players with 0 or less life do not lose the game.
If you control a land with six or more cactus
counters on it, destroy all lands. Whenever
Legitimoose deals combat damage to a player,
you get a Legitimoose Emblem.
{x}{x}{c}{c}: Legitimoose gets +X/+0 and is unblockable until end of turn.
{t}: Add {1} to your mana pool.