Whenever a creature receives damage, it sticks around on the creature until the end of the turn, so it's possible to slowly kill a creature by dealing damage several times during a turn
Ryu works especially well with damage multipliers like Fiery Emancipation or the recent City on Fire enchantment
In short, Ragnarok is totally overpowered, but to actually execute on the meld can be challenging
And should we all go back to saying Dega as a bit
(Until your next turn, those creatures attack each combat if able and attack a player other than you if able.) Sorcery Color tag templates(None) Protection (CTRL to add secondary) Legion Leadership Until end of turn, double target creature's power and it gains first strike
It doesn't matter who controlled the nonland permanent or who cast the spell, and it doesn't matter what happened to that spell after it was cast