It is not necessary to tear the card
Why Its Iconic: Simple and effective, Lightning Bolt is the red card, the embodiment of the colors philosophy of impulsive direct damage
Ephemerate is one of the cornerstones of the Soulherder Modern deck (which is a huge amount of fun), and it blinks a Creature at Instant speed
You'll see more designs like Tyvar's Stand and Bulwark Ox that give the ability to other creatures you control or even grant a player hexproof, rather than having it for themselves
So effectively, you'd be doubling the number of Squirrel tokens created each time with both cards working in tandem
One handy tip for starting to build your own deck is this: aim to have 20 Pokmon, 20 Trainer cards, and 20 Energy cards in there