Dominaria United

Cleaving Skyrider | Creature | Human Warrior | Flash Kicker {2}{R} (You may pay an additional {2}{R} as you cast this spell.) Flying When Cleaving Skyrider enters the battlefield, if it was kicked, it deals X damage to any target, where X is the number of attacking creatures. | Joshua Raphael

Balduvian Atrocity | Creature | Phyrexian Berserker | Kicker {R} (You may pay an additional {R} as you cast this spell.) Menace When Balduvian Atrocity enters the battlefield, if it was kicked, return target creature card with mana value 3 or less from your graveyard to the battlefield. It gains haste. Sacrifice it at the beginning of the next end step. | Mike Jordana

Balduvian Berserker | Creature | Kor Berserker | Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.) When Balduvian Berserker dies, it deals damage equal to its power to any target. | Cristi Balanescu

Elvish Hydromancer | Creature | Elf Wizard | Kicker {3}{U} (You may pay an additional {3}{U} as you cast this spell.) When Elvish Hydromancer enters the battlefield, if it was kicked, create a token that's a copy of target creature you control. | Fajareka Setiawan

Aron, Benalia's Ruin | Legendary Creature | Phyrexian Human | Menace (This creature can't be blocked except by two or more creatures.) {W}{B}, {T}, Sacrifice another creature: Put a +1/+1 counter on each creature you control. | Mark Winters

Queen Allenal of Ruadach | Legendary Creature | Elf Noble | Queen Allenal of Ruadach's power and toughness are each equal to the number of creatures you control. If one or more creature tokens would be created under your control, those tokens plus a 1/1 white Soldier creature token are created instead. | Ekaterina Burmak

Tatyova, Steward of Tides | Legendary Creature | Merfolk Druid | Land creatures you control have flying. Whenever a land enters the battlefield under your control, if you control seven or more lands, up to one target land you control becomes a 3/3 Elemental creature with haste. It's still a land. | Howard Lyon

Lagomos, Hand of Hatred | Legendary Creature | Human Shaman | At the beginning of combat on your turn, create a 2/1 red Elemental creature token with trample and haste. Sacrifice it at the beginning of the next end step. {T}: Search your library for a card, put it into your hand, then shuffle. Activate only if five or more creatures died this turn. | Tuan Duong Chu

Uurg, Spawn of Turg | Legendary Creature | Frog Beast | Uurg, Spawn of Turg's power is equal to the number of land cards in your graveyard. At the beginning of your upkeep, look at the top card of your library. You may put that card into your graveyard. {B}{G}, Sacrifice a land: You gain 2 life. | Nicholas Gregory