Force of Nature

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
At the beginning of your upkeep, this creature deals 8 damage to you unless you pay {G}{G}{G}{G}.

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Trample (If this creature would deal enough damage to its blockers to destroy them, you may have it deal the rest of its damage to defending player or planeswalker.)
At the beginning of your upkeep, Force of Nature deals 8 damage to you unless you pay {G}{G}{G}{G}.

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Ground Pounder

Tempest

The Swarm - Advanced Deck

Astral Cards

Guardian of the Tusk