Dominaria United

Stronghold Arena | Enchantment | | Kicker {G} and/or {W} (You may pay an additional {G} and/or {W} as you cast this spell.) When Stronghold Arena enters the battlefield, you gain 3 life for each time it was kicked. Whenever one or more creatures you control deal combat damage to a player, you may reveal the top card of your library and put it into your hand. If you do, you lose life equal to its mana value. | Alexander Mokhov

Leaf-Crowned Visionary | Creature | Elf Druid | Other Elves you control get +1/+1. Whenever you cast an Elf spell, you may pay {G}. If you do, draw a card. | Anna Steinbauer

Llanowar Loamspeaker | Creature | Elf Druid | {T}: Add one mana of any color. {T}: Target land you control becomes a 3/3 Elemental creature with haste until end of turn. It's still a land. Activate only as a sorcery. | Zara Alfonso

Quirion Beastcaller | Creature | Dryad Warrior | Whenever you cast a creature spell, put a +1/+1 counter on Quirion Beastcaller. When Quirion Beastcaller dies, distribute X +1/+1 counters among any number of target creatures you control, where X is the number of +1/+1 counters on Quirion Beastcaller. | Valera Lutfullina

Urborg Lhurgoyf | Creature | Lhurgoyf | Kicker {U} and/or {B} (You may pay an additional {U} and/or {B} as you cast this spell.) As Urborg Lhurgoyf enters the battlefield, mill three cards for each time it was kicked. Urborg Lhurgoyf's power is equal to the number of creature cards in your graveyard and its toughness is equal to that number plus 1. | Andrey Kuzinskiy

Ivy, Gleeful Spellthief | Legendary Creature | Faerie Rogue | Flying Whenever a player casts a spell that targets only a single creature other than Ivy, Gleeful Spellthief, you may copy that spell. The copy targets Ivy. (A copy of an Aura spell becomes a token.) | Evyn Fong