Innistrad: Crimson Vow

Volatile Arsonist | Creature | Human Werewolf | Menace, haste Whenever Volatile Arsonist attacks, it deals 1 damage to each of up to one target creature, up to one target player, and/or up to one target planeswalker. Daybound (If a player casts no spells during their own turn, it becomes night next turn.) | Gabor Szikszai

Chandra, Dressed to Kill | Legendary Planeswalker | Chandra | +1: Add {R}. Chandra, Dressed to Kill deals 1 damage to up to one target player or planeswalker. +1: Exile the top card of your library. If it's red, you may cast it this turn. −7: Exile the top five cards of your library. You may cast red spells from among them this turn. You get an emblem with "Whenever you cast a red spell, this emblem deals X damage to any target, where X is the amount of mana spent to cast that spell." | Viktor Titov

Manaform Hellkite | Creature | Dragon | Flying Whenever you cast a noncreature spell, create an X/X red Dragon Illusion creature token with flying and haste, where X is the amount of mana spent to cast that spell. Exile that token at the beginning of the next end step. | Andrew Mar

Cemetery Gatekeeper | Creature | Vampire | First strike When Cemetery Gatekeeper enters the battlefield, exile a card from a graveyard. Whenever a player plays a land or casts a spell, if it shares a card type with the exiled card, Cemetery Gatekeeper deals 2 damage to that player. | Tyler Jacobson

Olivia, Crimson Bride | Legendary Creature | Vampire Noble | Flying, haste Whenever Olivia, Crimson Bride attacks, return target creature card from your graveyard to the battlefield tapped and attacking. It gains "When you don't control a legendary Vampire, exile this creature." | Anna Steinbauer