In general, when looking at power level, I considered the overall game plan, the synergy of the 99 with that game plan, things like interaction, ramp, mana base and card draw, the commander, and the power of the remaining stand-alone cards
Kefka Palazzo (Purphoros, God of the Forge) Rating: 8/10 Purphoros, God of the Forge guarantees a lot of extra damage, and all you need to do is play more creatures
Since double strike deals damage twice, this will draw you two cards instead of just one if it isn't blocked
As always, thanks for reading!
Land Color tag templates(None) Temple of Mystery This land enters tapped
It was a Modern Pro Tour following the recent banning of Splinter Twin and Summer Bloom