artist tape - if you want to blank or prime only certain parts of a card the tape comes handy
Whoever it attacks only has to deal with one squirrel, while every other opponent has to deal with two
Another issue is that if one creature in a band can be blocked, they all can
There are also a bunch of versions of the basic interaction with this, Myr Turbine, or another other artifact token maker with an artifact sacrifice outlet like Blasting Station
With a cast trigger, it exiles two permanents, taking care of the two biggest threats from your opponents
For example, if Ephara is dealt what would be lethal damage and later loses indestructible (perhaps because you lose control of some enchantments), it will be destroyed the next time state-based actions are performed