Enchant creature you controlTap enchanted creature: Target creature other than the creature tapped this way gets +2/+1 until end of turn. Activate only if enchanted creature is untapped.
As an additional cost to cast this spell, discard a red or green card.Target creature gains trample and gets +X/+0 until end of turn, where X is that creature's mana value.
As an additional cost to cast this spell, you may pay .Prevent all combat damage that would be dealt this turn. If this spell's additional cost was paid, this effect doesn't affect combat damage that would be dealt by red creatures.
FlyingWhenever Swamp Mosquito attacks and isn't blocked, defending player gets a poison counter. (A player with ten or more poison counters loses the game.)
Enchant non-Wall creature you controlWhen Krovikan Plague enters, draw a card at the beginning of the next turn's upkeep.Tap enchanted creature: Krovikan Plague deals 1 damage to any target. Put a -0/-1 counter on enchanted creature. Activate only if enchanted creature is untapped.
Cast this spell only if you were dealt damage this turn by a red instant or sorcery spell.Suffocation deals 4 damage to the controller of the last red instant or sorcery spell that dealt damage to you this turn.Draw a card at the beginning of the next turn's upkeep.