The controlling player may have Urza, Lord High Artifcer to tap them for mana and negate their effects, or Wilderness Reclamation to untap anyway or additionally, or an Unwinding Clock, or may generate a winning board state then play such a stax effect to prevent opponents from doing anything about it
One fan discovered that he's been sitting on one of the rarest MTG card collections in the world and it's worth around $1m
Vizier of Many Faces is fine, but we've already got Phyrexian Metamorph and copycat cards can be tricky to play
For display purposes, the free magnetic case that ships with every order provides immediate protection right out of the box
For this reason, you get the rule 903.8, colloquially known as the commander tax. History of the Commander Tax The commander tax has existed ever since the formats inception back in 1996