Talk:Dragon Breath/@comment-15941505-20140324073704/@comment-6053530-20140324105504

All counters resolve backwards. Thus, Dracoenergy resolves first, increasing your monster's attack. Next, Dragon Breath resolves. If there is no longer a target (monster with 4k or less power) to use Dragon Breath on, Dragon Breath is sent to the drop zone without destroying anything.

TL;DR: Yes, if after the increase your monster's power is at 5k or more power, Dragon Breath cannot hit it.