It protects a permanent from being blocked, targeted, dealt damage, enchanted or equipped by anything with a particular quality e.g
Doom Prevails This deck is led by Doctor Doom, King of Latveria, a four-mana Grixis card that hits each opponent for two life any time you discard one or more land cards
In general, it's the kind of card that if you play in Commander, you'll annoy your opponent enough that they'll want to kill it (or even kill you), but not enough to protect yourself and actually win the game
The Guide would reanimate the Hulk, which you would then sacrifice to Carrion Feeder to get another trigger
Minds Eye Ive never liked Mind's Eye all that much, and it slots in at the bottom to give me a nice even number for my list
THE UR-DRAGON While Shivan Dragon might be the first Dragon in the same sense that Bulbasaur was the first Pokemon, The Ur-Dragon is the first in the same way Mew is: its the progenitor of Dragons across the multiverse