Caustic Bronco triggers on attack, not combat damage, which is really convenient
Going through Magic 's existing suite of resource mechanics with that in mind, energy counters were a great fit
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Mulldrifter's cousin, Nulldrifter, is now in Commander in Eldrazi form
In fact, a flashback spell like Increasing Ambition might be better if you skip casting it the first time and just discard it and flash it back for the greater effect
Basically, it's like your opponent (assuming you cast it during your opponent's turn, which is usually correct) just randomly decided to say "go," right in the middle of doing cool things