With damage being the most common payoff, you can look to cards like Furnace of Rath and Solphim, Mayhem Dominus as cards that double down on the damage and help you close the game faster
Theres no way of quantatively ranking which cards with side effects are the most powerful, as they all have unique benefits when played against opponents
Given how expensive a lot of colorless cards can be, this can provide those decks 6 to 15 mana a turn easily, and over 40 mana a round potentially
While it requires a bit of wheeling and dealing, you can likely talk opponents into letting you have whatever you want if theres a more obvious threat on the table
That being said, players should be eliminated and games should end
Amped Raptor Amped Raptor is listed among those banned from Modern, thanks to a certain Boros energy deck that tapped into its power