mtg.wtf

Whenever Orphans of the Wheat attacks, tap any number of untapped creatures you control. Orphans of the Wheat gets +1/+1 until end of turn for each creature tapped this way.

Whenever Orzhov Racketeers deals combat damage to a player, that player discards a card.
Afterlife 2

When Ossuary Rats enters, it deals X damage to target creature or planeswalker an opponent controls, where X is the number of creature cards in your graveyard.

Flash
When Otherworldly Escort dies, if it's not a Spirit, return it to the battlefield under its owner's control with four charge counters on it. It's a Spirit Detective.
{1}{W}, {T}, Remove a charge counter from Otherworldly Escort: Destroy target creature that dealt damage to you this turn.

When Outcaster Trailblazer enters, add one mana of any color.
Whenever another creature you control with power 4 or greater enters, draw a card.
Plot {2}{G}

Whenever an artifact you control enters, you may return Ovalchase Daredevil from your graveyard to your hand.

Trample, haste
Crew 1

When Overgrowth Elemental enters, put a +1/+1 counter on another target Elemental you control.
Whenever another creature you control dies, you gain 1 life. If that creature was an Elemental, put a +1/+1 counter on Overgrowth Elemental.

Impending 4—{1}{U}{U}
Flying
Whenever Overlord of the Floodpits enters or attacks, draw two cards, then discard a card.

Impending 4—{1}{G}{G}
Whenever Overlord of the Hauntwoods enters or attacks, create a tapped colorless land token named Everywhere that is every basic land type.

When Overwhelmed Archivist enters, draw a card, then discard a card.
Disturb {3}{U}

Whenever you commit a crime during your turn, Overzealous Muscle gains indestructible until end of turn.

Partner with Blue, Loyal Raptor
{T}: Put your choice of a menace, trample, reach, or haste counter on target Dinosaur. Activate only as a sorcery.

When Ox of Agonas enters, discard your hand, then draw three cards.
Escape — {R}{R}, Exile eight other cards from your graveyard.
Ox of Agonas escapes with a +1/+1 counter on it.

Sacrifice an artifact: Oxidda Daredevil gains haste until end of turn.

Affinity for Equipment
Trample

Affinity for Mountains
Haste

Ozox, the Clattering King can't block.
When Ozox dies, create Jumblebones, a legendary 2/1 black Skeleton creature token with "This creature can't block" and "When this creature leaves the battlefield, return target card named Ozox, the Clattering King from your graveyard to your hand."

Flash
When Pack Guardian enters, you may discard a land card. If you do, create a 2/2 green Wolf creature token.

Whenever you cast an artifact spell, you may have target creature get +2/+0 and gain deathtouch until end of turn.

Fear
At the beginning of your upkeep, sacrifice a creature if you don't control an Ogre.

Whenever Paired Tactician and at least one other Warrior attack, put a +1/+1 counter on Paired Tactician.

Battalion — Whenever Paladin Elizabeth Taggerdy and at least two other creatures attack, draw a card, then you may put a creature card with mana value X or less from your hand onto the battlefield tapped and attacking, where X is Paladin Elizabeth Taggerdy's power.

When Paladin of the Bloodstained enters, create a 1/1 white Vampire creature token with lifelink.

Other Dinosaurs you control have haste.
When Palani's Hatcher enters, create two 0/1 green Dinosaur Egg creature tokens.
At the beginning of combat on your turn, if you control one or more Eggs, sacrifice an Egg, then create a 3/3 green Dinosaur creature token.