mlp mtg cards are the legal Magic The Gathering: My Little Pony Secret Lair x My Little

Its cheaper, and its arguably easier to pull off without losing tempo holding mana up

Playing sideboard cards that are only good against Burn is likely a losing battle, no matter how good Kor Firewalker or Dragon's Claw might be in the Burn matchup

One of the reasons the Energy deck had been so successful in Standard is that the sum of the parts is greater than the whole

The fact that it can also hit artifacts is incredibly relevant, too

If you'll notice, I included the rulings text straight from the MTG website

The biggest downside to this card is it has to die, so if someone uses exile removal on it or it gets blinked, you do lose those cards permanently