Singles

Players can't untap more than one creature during their untap steps.

Flying (This creature can't be blocked except by creatures with flying or reach.) {R}: Shivan Dragon gets +1/+0 until end of turn.

Destroy target artifact.

Sedge Troll gets +1/+1 as long as you control a Swamp. {B}: Regenerate Sedge Troll.

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...

Flying

Choose one — • Counter target blue spell. • Destroy target blue permanent.

White creatures get +1/+1.

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

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Lightning Bolt deals 3 damage to any target.

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

Ironclaw Orcs can't block creatures with power 2 or greater.

At the beginning of your upkeep, sacrifice Conversion unless you pay {W}{W}. All Mountains are Plains.

Flying {R}: Granite Gargoyle gets +0/+1 until end of turn.

Other Goblin creatures get +1/+1 and have mountainwalk. (They can't be blocked as long as defending player controls a Mountain.)

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

Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy.

Destroy all Plains.

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