Urza, Lord High Artificer [Modern Horizons] Island Swamp Mind Bomb deals damage to

Mind Bomb deals damage to each player equal to 3 minus the number of cards they discarded this way

{T}: Create a 1/1 green Elf Warrior creature token

and when the pages were black with ink

where he discovered the remarkable Mightstone

You may cast a spell from among those cards without paying its mana cost

Urza, Lord High Artificer [Modern Horizons] Island Swamp Mind Bomb deals damage toSet: Modern Horizons Type: Legendary Creature Human Artificer Rarity: Mythic Cost: {2}{U}{U} When Urza, Lord High Artificer enters the battlefield, create a 0 0 colorless Construct artifact creature token with "This creature gets +1 +1 for each artifact you control." Tap an untapped artifact you control: Add {U}. {5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.