If an opponent controls a Forest and you control a Swamp, you may cast this spell without paying its mana cost.
: This creature gets +1/+1 until end of turn.

: This creature deals 1 damage to each creature without flying and each player. Any player may activate this ability.

: Target creature gains protection from the color of its controller's choice until end of turn. Any player may activate this ability.

All creatures have forestwalk. (They can't be blocked as long as defending player controls a Forest.)

, : This creature deals X damage to target attacking or blocking creature.

, : Search your library for a Mercenary permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.

, , Sacrifice this creature: It deals X damage to any target.

, : Search your library for a Rebel permanent card with mana value 5 or less, put it onto the battlefield, then shuffle.

, : Prevent the next X damage that would be dealt to any target this turn.

Flying
When this creature enters, each other player may put an artifact or enchantment card onto the battlefield from their hand.

When this creature enters, you may return target land to its owner's hand.

When this creature enters, each other player may return a creature card from their graveyard to the battlefield.

Warpath deals 3 damage to each blocking creature and each blocked creature.

Whenever this creature is dealt damage, you may create that many 1/1 green Insect creature tokens.

: Target unblocked attacking creature becomes blocked. Activate only during combat after blockers are declared. (This ability works on creatures that can't be blocked.)

Whenever this creature blocks or becomes blocked by a nonblack creature, destroy that creature at end of combat.

Defender (This creature can't attack.)
: Target creature gets +0/+4 until end of turn.

If an opponent controls a Mountain and you control an Island, you may cast this spell without paying its mana cost.
Flying

When this creature enters, each other player may search their library for a land card and put that card onto the battlefield. Then each player who searched their library this way shuffles.

You may return three Islands you control to their owner's hand rather than pay this spell's mana cost.
Counter target spell.

: This creature deals 1 damage to each creature with flying and each player. Any player may activate this ability.

At the beginning of each player's upkeep, that player may put a +1/+1 counter on target creature of their choice.

When this creature enters, each other player may put a creature card from their hand onto the battlefield.

: This creature gains trample until end of turn.

Creatures you control have fear. (They can't be blocked except by artifact creatures and/or black creatures.)

: This creature gets +1/+1 until end of turn.

Whenever a creature you control deals combat damage to a player, that player discards a card.

Trample

, : Target creature you control gets +X/+X until end of turn. Destroy it at the beginning of the next end step.

Whenever a player casts a green or white spell, that player discards a card.

: Mill a card. If a land card was milled this way, this creature can't be blocked this turn.

: This creature gets +3/+3 until end of turn.

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

Whenever this creature becomes blocked, you gain 2 life.

Whenever a creature you control deals combat damage, you gain that much life.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
, : Search your library for a Mercenary permanent card with mana value 4 or less, put it onto the battlefield, then shuffle.