Make sure you have enough graveyard recursion, re-shuffle cards like Enhanced Survillance, Feldon's Cane or Finale of Revelation, or anti-mill win conditions like Laboratory Maniac as backup plans for when you surveil a bit too vigorously
Theres the Instant Berserkers Fury and just a few other Artifacts that require either spending Mana or dealing combat damage to a player for you to roll that die
The card disrupted the balance of the game
Of course, EtB + Attack isnt the only repeatable removal
As the name Hearthflame would suggest, when Ogerpon dons this particular piece of headgear, she takes on a Fire-type skillset, including the Wrathful Hearth attack
Three mana for a 2/3 with lifelink is a good deal, especially with a Hero's Downfall attached