Flying, vigilance
Instant and sorcery spells cost less to cast.
Flying
When Balustrade Spy enters the battlefield, target player reveals cards from the top of his or her library until he or she reveals a land card, then puts those cards into his or her graveyard.
At the beginning of your upkeep, if you control a black permanent, you may put a +1/+1 counter on Bloodhall Ooze.
At the beginning of your upkeep, if you control a green permanent, you may put a +1/+1 counter on Bloodhall Ooze.
Boneyard Wurm's power and toughness are each equal to the number of creature cards in your graveyard.
Enchant nonblack creature
Enchanted creature gets +1/+2, has flying, and is an Angel in addition to its other types.
When Carrion Thrash dies, you may pay . If you do, return another target creature card from your graveyard to your hand.
Whenever a creature without flying attacks you or a planeswalker you control, Circle of Flame deals 1 damage to that creature.
Enchant creature
As long as enchanted creature is blue, it gets +1/+1 and has shroud. (It can't be the target of spells or abilities.)
As long as enchanted creature is red, it gets +1/+1 and has haste.
Islandwalk
Whenever Cold-Eyed Selkie deals combat damage to a player, you may draw that many cards.
Combust can't be countered by spells or abilities.
Combust deals 5 damage to target white or blue creature. The damage can't be prevented.
Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 2-3
3/3
LEVEL 4+
4/4
Other Merfolk creatures you control get +1/+1.
Enchant player
At the beginning of enchanted player's upkeep, that player puts the top two cards of his or her library into his or her graveyard.
Dark Temper deals 2 damage to target creature. If you control a black permanent, destroy the creature instead.
At the beginning of each upkeep, put a 1/1 red and green Dragon creature token with flying and devour 2 onto the battlefield. (As the token enters the battlefield, you may sacrifice any number of creatures. It enters the battlefield with twice that many +1/+1 counters on it.)
Put two 1/1 red Goblin creature tokens onto the battlefield.
Enchanted creature gets +10/+10 and has trample and annihilator 2. (Whenever it attacks, defending player sacrifices two permanents.)
Emeria, the Sky Ruin enters the battlefield tapped.
At the beginning of your upkeep, if you control seven or more Plains, you may return target creature card from your graveyard to the battlefield.
: Add to your mana pool.
When Emrakul's Hatcher enters the battlefield, put three 0/1 colorless Eldrazi Spawn creature tokens onto the battlefield. They have "Sacrifice this creature: Add to your mana pool."
Whenever Engulfing Slagwurm blocks or becomes blocked by a creature, destroy that creature. You gain life equal to that creature's toughness.
Whenever Flameblast Dragon attacks, you may pay . If you do, Flameblast Dragon deals X damage to target creature or player.
Prevent all combat damage that would be dealt this turn.
At the beginning of your upkeep, put a 1/1 red Goblin creature token with haste onto the battlefield.
Goblin creatures attack each turn if able.
Equipped creature gets +X/+X, where X is its converted mana cost.
Equip
Flying, haste
Whenever Hellkite Charger attacks, you may pay . If you do, untap all attacking creatures and after this phase, there is an additional combat phase.