In Sultai colors, you can do some nasty things with this, from using Buried Alive/Entomb early on to setup a great later turn, to just replaying the Maha, Its Feathers Night and Toxrill, the Corrosive that your opponents worked so so hard to get rid of
Once a ward ability of another Frog has triggered, causing it to lose ward by removing Long River Lurker or changing its creature types won't affect that ability
If youre casting your commander from the command zone, the + per previous cast is always an additional cost you must pay on top of the chosen base cost
If Driftgloom Coyote leaves the battlefield before its triggered ability resolves, the target creature won't be exiled
If you cant add counters to permanents, you cant add age counters
With so many reprints of commander staples and older cards not having symbols you can easily build a deck that make you a Treasure each time you cast a card