Jack Skellington

Fear, Intimidate, Shadow, Menace, Skulk, Daybound
Whenever Jack deals combat damage to a player, each opponent creates a Pumpkin artifact token. It becomes Night.
Once during your turn, you may play a land or cast a spell from exile with a pumpkin counter on it. If you cast a spell this way, you may spend mana as though it were mana of any color to cast that spell.