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
Three mana for a 2/3 with lifelink is a good deal, especially with a Hero's Downfall attached
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
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
Take 2 fire energy from your energy zone and attach it to that Pokmon
Set that target, but banish it during the End Phase of your next turn if it is still on the field