Opportunity

Betrayal

Enchant creature an opponent controls
Whenever enchanted creature becomes tapped, you draw a card.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Capsize

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Return target permanent to its owner's hand.

Dakkon Blackblade

Dakkon Blackblade's power and toughness are each equal to the number of lands you control.

Dominate

Gain control of target creature with mana value X or less.

Undermine

Counter target spell. Its controller loses 3 life.

Absorb

Congregate

Target player gains 2 life for each creature on the battlefield.

Disenchant

Reins of Power

Untap all creatures you control and all creatures target opponent controls. You and that opponent each gain control of all creatures the other controls until end of turn. Those creatures gain haste until end of turn.

Disrupt

Counter target instant or sorcery spell unless its controller pays {1}.
Draw a card.

Power Sink

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 unspent mana.

Air Bladder

Enchant creature
Enchanted creature has flying.
Enchanted creature can block only creatures with flying.

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Blessing

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

Boomerang

Return target permanent to its owner's hand.

Remove Soul

Aboshan's Desire

Enchant creature
Enchanted creature has flying.
Threshold — Enchanted creature has shroud as long as seven or more cards are in your graveyard. (It can't be the target of spells or abilities.)

Curiosity

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Annul

Counter target artifact or enchantment spell.

Counterspell

Blessed Reversal

You gain 3 life for each creature attacking you.

Dig Through Time

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
Look at the top seven cards of your library. Put two of them into your hand and the rest on the bottom of your library in any order.

Confound

Counter target spell that targets a creature.
Draw a card.

Fact or Fiction

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

Armor of Faith

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