In Limited, thats easily enough to end the game
The good thing about Bonus Round is that it copies all of your stuff for the round, not just a target spell on the stack
Given that you needed at least four permanent types just to transform into this, that means you should be getting at least four mana per tap - and thats only going to become more as the game goes on
Emerald can be an extremely fun ink colour to play for this reason, and boasts some of the best Lorcana cards in The First Chapter as a whole, allowing the opportunity to mess with rival players and become a real thorn in their side
The only creatures that assign combat damage in that step are the remaining attackers and blockers that had neither first strike nor double strike as the first combat damage step began, as well as the remaining attackers and blockers that currently have double strike
Culling Ritual We can stick to the topic of cEDH for a moment, actually