You may exert Ahn-Crop Champion as it attacks. When you do, untap all other creatures you control. (An exerted creature won't untap during your next untap step.)
4 /
4
{W}{U}
Azorius Charm
Instant
Choose one --
• Creatures you control gain lifelink until end of turn.
• Draw a card.
• Put target attacking or blocking creature on top of its owner's library.
{1}{U}{R}
Bloodwater Entity
Creature - Elemental
Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Bloodwater Entity enters the battlefield, you may put target instant or sorcery card from your graveyard on top of your library.
2 /
2
{2}{G}{U}
Bounty of the Luxa
Enchantment
At the beginning of your precombat main phase, remove all flood counters from Bounty of the Luxa. If no counters were removed this way, put a flood counter on Bounty of the Luxa and draw a card. Otherwise, add {C}{G}{U}.
{W}{B}
Chief of the Edge
Creature - Human Warrior
Other Warrior creatures you control get +1/+0.
3 /
2
{W}{B}
Chief of the Scale
Creature - Human Warrior
Other Warrior creatures you control get +0/+1.
2 /
3
{1}{G}{W}
Chronicler of Heroes
Creature - Centaur Wizard
When Chronicler of Heroes enters the battlefield, draw a card if you control a creature with a +1/+1 counter on it.
3 /
3
{2}{B}{G}
Corpsejack Menace
Creature - Fungus
If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on it instead.
4 /
4
{3}{B}{G}
Death Frenzy
Sorcery
All creatures get -2/-2 until end of turn. Whenever a creature dies this turn, you gain 1 life.
{1}{U}{B}
Dimir Doppelganger
Creature - Shapeshifter
{1}{U}{B}: Exile target creature card from a graveyard. Dimir Doppelganger becomes a copy of that card, except it has this ability.
0 /
2
{3}{U}{B}
Extract from Darkness
Sorcery
Each player mills two cards. Then you put a creature card from a graveyard onto the battlefield under your control.
{1}{U}{R}
Fevered Visions
Enchantment
At the beginning of each player's end step, that player draws a card. If the player is your opponent and has four or more cards in hand, Fevered Visions deals 2 damage to that player.
{R}{W}
Honored Crop-Captain
Creature - Human Warrior
Whenever Honored Crop-Captain attacks, other attacking creatures get +1/+0 until end of turn.
3 /
2
{1}{W}{U}
Invocation of Saint Traft
Enchantment - Aura
Enchant creature
Enchanted creature has "Whenever this creature attacks, create a 4/4 white Angel creature token with flying that's tapped and attacking. Exile that token at end of combat."
{1}{R}{G}
Khenra Charioteer
Creature - Jackal Warrior
Trample
Other creatures you control have trample.
3 /
3
{1}{G}{W}
Knight of the Reliquary
Creature - Human Knight
Knight of the Reliquary gets +1/+1 for each land card in your graveyard.
{T}, Sacrifice a Forest or Plains: Search your library for a land card, put it onto the battlefield, then shuffle.
2 /
2
{2}{B}{R}
Merciless Javelineer
Creature - Minotaur Warrior
{2}, Discard a card: Put a -1/-1 counter on target creature. That creature can't block this turn.
4 /
2
{2}{U}{R}
Mercurial Geists
Creature - Spirit
Flying
Whenever you cast an instant or sorcery spell, Mercurial Geists gets +3/+0 until end of turn.
1 /
3
{1}{W}{B}
Mortify
Instant
Destroy target creature or enchantment.
{G}{W}
Oath of Ajani
Legendary Enchantment
When Oath of Ajani enters the battlefield, put a +1/+1 counter on each creature you control.
Planeswalker spells you cast cost {1} less to cast.
{1}{U}{B}
Prized Amalgam
Creature - Zombie
Whenever a creature enters the battlefield, if it entered from your graveyard or you cast it from your graveyard, return Prized Amalgam from your graveyard to the battlefield tapped at the beginning of the next end step.
3 /
3
{3}{R}{G}
Raging Swordtooth
Creature - Dinosaur
Trample
When Raging Swordtooth enters the battlefield, it deals 1 damage to each other creature.
Destroy target blocking creature. Creatures that were blocked by that creature this combat gain trample until end of turn.
{3}{R/G}
Rosheen Meanderer
Legendary Creature - Giant Shaman
{T}: Add {C}{C}{C}{C}. Spend this mana only on costs that contain {X}.
4 /
4
{U}{B}
Shadowstorm Vizier
Creature - Human Cleric
Flying
Whenever you cycle or discard a card, Shadowstorm Vizier gets +1/+1 until end of turn.
1 /
3
{5}{G}{U}
Simic Sky Swallower
Creature - Leviathan
Flying, trample
Shroud (This creature can't be the target of spells or abilities.)
6 /
6
{R}{W}
Sky Terror
Creature - Dinosaur
Flying, menace
2 /
2
{1}{W}{U}
Spell Queller
Creature - Spirit
Flash
Flying
When Spell Queller enters the battlefield, exile target spell with mana value 4 or less.
When Spell Queller leaves the battlefield, the exiled card's owner may cast that card without paying its mana cost.
2 /
3
{2}{W}{U}
Spire Patrol
Creature - Human Soldier
Flying
When Spire Patrol enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.
3 /
2
{3}{B}{G}
Spiritmonger
Creature - Beast
Whenever Spiritmonger deals damage to a creature, put a +1/+1 counter on Spiritmonger.
{B}: Regenerate Spiritmonger.
{G}: Spiritmonger becomes the color of your choice until end of turn.
6 /
6
{1}{B}{R}
Spontaneous Combustion
Instant
As an additional cost to cast this spell, sacrifice a creature.
Spontaneous Combustion deals 3 damage to each creature.
{2}{G}{ // }{4}{U}{U}
Spring // Mind
Sorcery // Instant
Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Aftermath (Cast this spell only from your graveyard. Then exile it.)
Draw two cards.
{2}{W}{ // }{2}{B}
Start // Finish
Instant // Sorcery
Create two 1/1 white Warrior creature tokens with vigilance.
Aftermath (Cast this spell only from your graveyard. Then exile it.)
As an additional cost to cast Finish, sacrifice a creature.
Destroy target creature.
{2}{R}{ // }{1}{G}
Struggle // Survive
Instant // Sorcery
Struggle deals damage to target creature equal to the number of lands you control.
Aftermath (Cast this spell only from your graveyard. Then exile it.)
Each player shuffles their graveyard into their library.
{B}{R}
Terminate
Instant
Destroy target creature. It can't be regenerated.
{1}{G}{U}
Weaver of Currents
Creature - Naga Druid
{T}: Add {C}{C}.
2 /
2
{1}{B}{R}
Weldfast Engineer
Creature - Human Artificer
At the beginning of combat on your turn, target artifact creature you control gets +2/+0 until end of turn.
3 /
3
{B}{G}
Winding Constrictor
Creature - Snake
If one or more counters would be put on an artifact or creature you control, that many plus one of each of those kinds of counters are put on that permanent instead.
If you would get one or more counters, you get that many plus one of each of those kinds of counters instead.