If you roll the planar die in a Planechase game, you can remove a +1/+1 counter from Xenosquirrels, but you can't alter the result of the roll
Magic: The Gathering is already full of hidden information and back-and-forth interaction, but the morph mechanic, first introduced in 2002's Onslaught set, introduces an extra layer of secrecy and trickery to the game
Outside of that, I dont have any experience attempting to protect them
The most you can do is block and long range attacks during this battle as he'll try doing a fly attack towards you
This means youll be dodging not just removal spells, but also pesky targeted abilities as well
Boros Swiftblade Creature Human Soldier Double strike When the Boros Legion attacks, swiftblades enter the fray first