Wilds of Eldraine

Ash, Party Crasher | Legendary Creature | Human Peasant | Haste Celebration — Whenever Ash, Party Crasher attacks, if two or more nonland permanents entered the battlefield under your control this turn, put a +1/+1 counter on Ash. | Jason Rainville

Johann, Apprentice Sorcerer | Legendary Creature | Human Wizard | You may look at the top card of your library any time. Once each turn, you may cast an instant or sorcery spell from the top of your library. (You still pay its costs. Timing rules still apply.) | Dmitry Burmak

Rowan, Scion of War | Legendary Creature | Human Wizard | Menace {T}: Spells you cast this turn that are black and/or red cost {X} less to cast, where X is the amount of life you lost this turn. Activate only as a sorcery. | Magali Villeneuve

Totentanz, Swarm Piper | Legendary Creature | Human Warlock Bard | Whenever Totentanz, Swarm Piper or another nontoken creature you control dies, create a 1/1 black Rat creature token with "This creature can't block." {1}{B}: Target attacking Rat you control gains deathtouch until end of turn. | Matt Stewart

Agatha of the Vile Cauldron | Legendary Creature | Human Warlock | Activated abilities of creatures you control cost X less to activate, where X is Agatha of the Vile Cauldron's power. This effect can't reduce the mana in that cost to less than one mana. {4}{R}{G}: Other creatures you control get +1/+1 and gain trample and haste until end of turn. | Jason A. Engle

Ruby, Daring Tracker | Legendary Creature | Human Scout | Haste Whenever Ruby, Daring Tracker attacks while you control a creature with power 4 or greater, Ruby gets +2/+2 until end of turn. {T}: Add {R} or {G}. | Ekaterina Burmak

Beluna Grandsquall | Legendary Creature | Giant Noble | Trample Permanent spells you cast that have an Adventure cost {1} less to cast. | Victor Adame Minguez