Cards that deal non-combat damage (to any target or specifically to battles) are the only other sources that can remove defense counters on battle cards manually
You can probably bundle through just fine with just edict and mass removal stuff but I do feel safer with a targetted option main
Flame of Anor If you have wizards and can turn this into Gandalfs Command, it's so much the better
Note that's not planeswalkers so you cannot target them for loyalty counter doubling since it says each kind of counter, not just +1/+1, like Shield or energy counters on artifacts (or...say....fellowship counters...) She's great fun for the masses leading a Commander deck
Many of the stronger God cards that can be included in the deck like Ilharg, the Raze Boar and Surtr, Fiery Jotun, which also spiked recently, will trigger Kalemnes triggers, accelerating your game plan immensely
It can very quickly spit out a ton of tokens, and those tokens can then be turned into sacrifice fodder for game-winning effects or simply more mana