95% of the time, the triggered ability probably isnt worth a removal spell thats going to be better sent towards Rhystic Study or Smothering Tithe, but once enough cards have been exiled, the risk from rolling a 20 is going to weigh on your opponents
It's just one dork goaded, but you never have to do anything else, it's permanently goaded and then you also get a power boost too
By turn five, you can make him a 7/7 and ping away a couple of little guys, but turn 12
Decks in these colors will have absolutely no problem casting three spells in the same turn in order to enable her activated ability, which allows you to efficiently combo off in a variety of ways
Then amass Orcs 1
You can also stack multiple instances of Phelddagrifs abilities to give your opponents lots of benefits, enabling different payoffs