Demanding Dragon [Core Set 2019] Goblin Mime it can't be regenerated this

it can't be regenerated this turn

Set: Exodus Type: Enchantment Rarity: Uncommon Cost: {2}{W} Put a card from your hand on top of your library: The next time a black or red source of your choice would deal damage this turn

and all the while the great beast slumbered

Set: Seventh Edition Type: Sorcery Rarity: Common Cost: {1}{R} Spitting Earth deals damage to target creature equal to the number of Mountains you control

Demanding Dragon [Core Set 2019] Goblin Mime it can't be regenerated thisSet: Core Set 2019 Type: Creature Dragon Rarity: Rare Cost: {3}{R}{R} Flying When Demanding Dragon enters the battlefield, it deals 5 damage to target opponent unless that player sacrifices a creature. A knight's devotion to their steed goes only so far.