Evasion and vigilance are especially important in Commander and transferring counters onto other creatures discourages removal
For Sieges, the battle must always be protected by an opponent of the controller if the protect leaves the game, the controller must instead choose a different opponent to protect it
It's not exciting to add backup plans, but in a deck that relies so heavily on its commander, it's an important card to slot in
Not only are you limited to one copy of a specific Radiant Pokmon (e.g., one Radiant Greninja), but you can only include one Radiant Pokmon of any kind in your entire deck
Palantir of Orthanc has found its way into several Legacy decks as a sideboard card that isn't easily answered by the current meta
Certain items can only be purchased using specific kinds of currency, ensuring that your focus isnt too heavily weighted towards one aspect of the game