A fair number of Fire Nation-based creatures and some others also come with Prowess, so every time youre casting a noncreature spell, theyll get +1/+1 until the end of the turn
That tempo loss would often mean they couldnt safely cast a planeswalker or other threat without getting battered
Even though the actual Apocalypse Chime card is terrible, implementing a wrath-style effect on her in the vein of this would be extremely fitting and could make for a cool modern commander
As well as double strike, all your creatures permanently now have trample, hexproof, and haste
If your opponents Bench and Active Spot are swamped with Pokemon V and/or Pokemon GX, Gengars Fear and Panic attack is particularly potent
He can still do all the artifact toolbox stuff he normally does, but perhaps more important is how brutal he is against artifact lands