The Flaming Doomsday

When The Flaming Doomsday enters the battlefield, deal 1 damage to all creatures, players,
and planeswalkers. Then, repeat this process
until either 5 creatures leave the battlefield
or this ability has repeated 8 times.
Red spells have flash.
{r} Discard a red card with converted mana cost 1:
Deal 3 damage to any target.