Urza's Saga

When an opponent casts a creature spell, if Opal Titan is an enchantment, Opal Titan becomes a 4/4 Giant creature with protection from each of that...

Flying When Abyssal Horror enters the battlefield, target player discards two cards.

Destroy target artifact or enchantment.

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...

{W}: The next time a blue source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw ...

Shower of Sparks deals 1 damage to target creature and 1 damage to target player or planeswalker.

When an opponent casts an artifact spell, if Hidden Guerrillas is an enchantment, Hidden Guerrillas becomes a 5/3 Soldier creature with trample.

{1}{W}: Prevent all combat damage that would be dealt this turn by target attacking creature with flying.

{T}: Prevent the next 2 damage that would be dealt to any target this turn.

{T}: Return Wizard Mentor and target creature you control to their owner's hand.

Enchant creature Enchanted creature gets +2/+2 and has flying. {R}: Enchanted creature gets +1/+0 until end of turn.

Goblin Raider can't block.

Destroy target land or nonblack creature. It can't be regenerated.

If a source would deal damage to you, prevent 1 of that damage.

Destroy target nonartifact, nonblack creature. It can't be regenerated. Cycling {2} ({2}, Discard this card: Draw a card.)

Whenever a player casts an enchantment spell, counter it.

{T}: You gain 1 life.

Destroy two target lands.

Jagged Lightning deals 3 damage to each of two target creatures.

Echo {4}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you p...

Draw two cards, then discard a card.

Attach target Aura attached to a creature or land to another permanent of that type.

Flying When Spire Owl enters the battlefield, look at the top four cards of your library, then put them back in any order.

Flying, protection from red