reshiram pokemon cards (28/113) [Black & White: Legendary Treasures] Fire Burning Flare (240) This Pokemon also does 60 damage to itself. Reshiram 017 - Reverse Holofoil

Which is precisely the weakness of RealmwalkerRealmwalker: If you're doing Kindred things, then this is going to be one of the best cards in your deck

Burn doesn't really need to answer Ensnaring Bridge and Merfolk doesn't care how fast it gets Blood Mooned

It doesn't matter whether you still control the permanent or whether it still has a counter

If your opponent has Detention Sphere, they can remove your Oblivion Ring with it, but they couldnt remove your Detention Sphere, so Detention Sphere is both better and worse in ways that generally seem to balance out

You can expect roughly one 1/1 and +3/+3 from its trigger each combat while it provides more cards to fuel your attacks