Ugin, the Spirit Dragon [Core Set 2021] Theme Token Card Set: Modern Horizons 3 Type:

Set: Modern Horizons 3 Type: Sorcery Rarity: Uncommon Cost: {5}{B/R}{B/R} This spell costs 1 less to cast for each 1 life your opponents have lost this turn

The same is true for creature spells you control and creature cards you own that aren't on the battlefield

I sent three such creatures against my foe

” -The Antiquities War

Ugin, the Spirit Dragon [Core Set 2021] Theme Token Card Set: Modern Horizons 3 Type:Set: Core Set 2021 Type: Legendary Planeswalker Ugin Rarity: Mythic Cost: {8} +2: Ugin, the Spirit Dragon deals 3 damage to any target. X: Exile each permanent with mana value X or less that's one or more colors. 10: You gain 7 life, draw seven cards, then put up to seven permanent cards from your hand onto the battlefield.