Creatures : Coalition Honor Guard, Standard Bearer, Trinket Mage, Shriekmaw, Bone Shredder, Man o War, Mulldrifter, Pawn of Ulamog, Clone, Windborn Muse, Entomber Exarch, Wonder Mixed in with the good, solid utility creatures are some ways to protect Ertai in the form of the Flagbearer creatures Coalition Honor Guard and Standard Bearer
Tashas Hideous Laughter I wanted to represent mill somewhere, and I believe Tasha's Hideous Laughter is top of the heap
ow.ly/RRQZ50M0l06 Someone let me know when there's a Lugia one Neat, but I haven't been into Pokemon cards since I was 12
Copying big scary creatures is nice, but so is copying creatures with ETB or death triggers, and theres plenty of that to go around
Once you have ratios that you like, I recommend swapping in cards that share the same role as the cards you swap out