Both have trample, which works great if you mutate either onto the deathtouching Mire Triton, and Gemrazer can mutate onto Stonecoil Serpent to inherit Serpents counters
FromTheShire: Always like to have better mana fixing
Blizzard Although it may be hard to cast and maintain Blizzard in play, the benefit from keeping this cumulative upkeep card around is fairly straightforward, especially if you combo with cards like Gigadrowse to tap your opponent's fliers and prevent them from untapping ever again
I cant even decide which combination of modes is the best because theyre all so good
Vigor doesnt make your creatures any bigger immediately, but using Rikus ability to make a copy of it means that the two Vigors can protect each other while making it a very bad idea to block (or attack into) any of your creatures
THE HORRORS BEYOND THE STARRRS I noted in my New Capenna Commander reviews that those precons seem more one-note in their focus on supporting a specific commander