It would be better to play Crucible of Worlds or even Panharmonicon in eternal formats than a 6-mana monster, so financially, this card isn't going to hold its price for too long unless it breaks commander format as well
Angel of Serenity is a reasonable option in B/R/W, but it isnt at its best alongside Chandra, who I think is key to the archetype
Clouds mind never fully recovers from the trauma, which is why the scene of Zack handing him the sword and Cloud unconsciously adopting Zacks identity, becomes one of the most important reveals in the entire game
Emiel can Cloudshift any creature you control, with the added bonus of letting you pay one green/white to give that creature a +1/+1 counter on the way back, or two if it's a unicorn
I'd give Path to Exile a 5 here because it can take out literally anything, including creatures with persist or undying
MTG Kinsbaile Borderguard For better or worse, Kinsbaile Borderguard is a Kithkin Typal card through and through