Their presence both during the Ice Age block and Kaldheim are a great design choice and wonderful worldbuilding that plays with card types
Once you've chosen both modes for the spell, it doesn't matter whether you continue to control a commander
When you boot the game up for the first time, you have the option of migrating your account from Online
Mew ex - 053 - SV: Scarlet & Violet Promo Cards (SVP) The 151 Mew promo saw a quick spike to $90 (72) before cooling to about $70 (56)
If you manage to find two or three, you'll likely have a significant card advantage over your opponent
(I always imagine it like being what youd get if chess had certain edge cases where rooks could fly, bishops could teleport, or for a second, pawns were driving tanks.) Since the game is built around several thousand collectible cards, and almost every card has some additional unique ability to it one way or the other, it creates an endlessly manipulable, constantly surprising experience