MTG

Rock Hydra enters the battlefield with X +1/+1 counters on it. For each 1 damage that would be dealt to Rock Hydra, if it has a +1/+1 counter on it...

Attacking creatures you control get +1/+0.

Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.

Blue creatures don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of ta...

Kird Ape gets +1/+2 as long as you control a Forest.

Keldon Warlord's power and toughness are each equal to the number of non-Wall creatures you control.

{R}: Goblin Balloon Brigade gains flying until end of turn.

Enchant creature {R}: Enchanted creature gets +1/+0 until end of turn.

Enchant creature When Earthbind enters the battlefield, if enchanted creature has flying, Earthbind deals 2 damage to that creature and Earthbind g...

Target spell or permanent becomes red. (Its mana symbols remain unchanged.)

Enchant creature Enchanted creature has mountainwalk. (It can't be blocked as long as defending player controls a Mountain.)

Sacrifice an artifact: Atog gets +2/+2 until end of turn.

Flying (This creature can't be blocked except by creatures with flying or reach.) {B}: Regenerate Will-o'-the-Wisp. (The next time this creature wo...

Enchant artifact At the beginning of the upkeep of enchanted artifact's controller, Warp Artifact deals 1 damage to that player.

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

Defender (This creature can't attack.) {U}: Wall of Water gets +1/+0 until end of turn.

Defender, flying (This creature can't attack, and it can block creatures with flying.)

Destroy X target Mountains. Volcanic Eruption deals damage to each creature and each player equal to the number of Mountains put into a graveyard t...

Change the text of target spell or permanent by replacing all instances of one color word with another. (For example, you may change "target black ...

You may have Vesuvan Doppelganger enter the battlefield as a copy of any creature on the battlefield, except it doesn't copy that creature's color ...

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspe...

Flying

Enchant creature Enchanted creature has protection from blue. This effect doesn't remove Blue Ward.

Whenever a Forest an opponent controls becomes tapped, you gain 1 life.