You gain life every turn even if its just sitting safely in the command zone
There are also other types of card covers, such as dark card covers, which cover the back of each card
It also screws up the math for your opponents, suddenly, they get a 2:1 since they remove your card with a card of theirs and they get their card back (assuming you are getting anything useful from the saga) that being said if this is for like an enchantress deck, you get a trigger off the ETB and don't care so much if it goes away
That means as your forces grow, your mana is not being wasted
I've already decided to titled it "The deck's sole purpose is just so I can play Comet, Stellar Pup"
If your opponents can't deal with Evasive characters, they can exert themselves to draw cards and gain lore with no fear of retaliation aside from outright removal