Ravnica Allegiance

Frilled Mystic | Creature | Elf Lizard Wizard | Flash When Frilled Mystic enters the battlefield, you may counter target spell. | Randy Vargas

Prime Speaker Vannifar | Legendary Creature | Elf Ooze Wizard | {T}, Sacrifice another creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery. | Kieran Yanner

Sharktocrab | Creature | Shark Octopus Crab | {2}{G}{U}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.) Whenever one or more +1/+1 counters are put on Sharktocrab, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step. | Jehan Choo

Zegana, Utopian Speaker | Legendary Creature | Merfolk Wizard | When Zegana, Utopian Speaker enters the battlefield, if you control another creature with a +1/+1 counter on it, draw a card. {4}{G}{U}: Adapt 4. (If this creature has no +1/+1 counters on it, put four +1/+1 counters on it.) Each creature you control with a +1/+1 counter on it has trample. | Slawomir Maniak

Domri, Chaos Bringer | Legendary Planeswalker | Domri | +1: Add {R} or {G}. If that mana is spent on a creature spell, it gains riot. (It enters the battlefield with your choice of a +1/+1 counter or haste.) −3: Look at the top four cards of your library. You may reveal up to two creature cards from among them and put them into your hand. Put the rest on the bottom of your library in a random order. −8: You get an emblem with "At the beginning of each end step, create a 4/4 red and green Beast creature token with trample." | Zack Stella

Frenzied Arynx | Creature | Cat Beast | Riot (This creature enters the battlefield with your choice of a +1/+1 counter or haste.) Trample {4}{R}{G}: Frenzied Arynx gets +3/+0 until end of turn. | Filip Burburan

Sunder Shaman | Creature | Giant Shaman | Sunder Shaman can't be blocked by more than one creature. Whenever Sunder Shaman deals combat damage to a player, destroy target artifact or enchantment that player controls. | Jason Rainville

Collision // Colossus | Instant // Instant | | Collision deals 6 damage to target creature with flying. // Target creature gets +4/+2 and gains trample until end of turn. | Jason Rainville