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

Join Forces | Instant | | Untap up to two target creatures. They each get +2/+2 until end of turn. | Aurore Folny

Love Song of Night and Day | Enchantment | Saga | Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.) I — You and target opponent each draw two cards. II — Create a 1/1 white Bird creature token with flying. III — Put a +1/+1 counter on each of up to two target creatures. | Eli Minaya

Hurloon Battle Hymn | Instant | | Kicker {W} (You may pay an additional {W} as you cast this spell.) Hurloon Battle Hymn deals 4 damage to target creature or planeswalker. If this spell was kicked, you gain 4 life. | Dominik Mayer

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