Sundial of the Infinite [Mystery Booster] Wizards Play Network 2011 Nightmare's power and toughness are

Nightmare's power and toughness are each equal to the number of Swamps you control

{4}{W}: Cave of the Frost Dragon becomes a 3/4 white Dragon creature with flying until end of turn

Set: Strixhaven: School of Mages Mystical Archive Type: Instant Rarity: Mythic Cost: {2}{W} Until your next turn

Exile Eldritch Evolution

−8: You get an emblem with "You may cast instant and sorcery spells from your graveyard

Sundial of the Infinite [Mystery Booster] Wizards Play Network 2011 Nightmare's power and toughness areSet: Mystery Booster Type: Artifact Rarity: Rare Cost: {2} {1}, {T}: End the turn. Activate only during your turn. (Exile all spells and abilities from the stack. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)