All you need then is a way to repeatedly untap Emry, like Mirran Spy, and you have yourself tons of mana, draw power, or a massive storm count to combo off with
It allows to activate the ability even when there is no target for it, be it to just add loyalty counters onto the planeswalker and not waste a turn doing nothing, or to get an extra effect out of the ability that doesnt need the targeting part
With so many "Trap Holes" in the game, these are the best of the best
Scrappy Survivors : Collect Junk tokens to scavenge through your deck for useful Equipment, Food and other necessities on your journey to becoming a wasteland legend
Its really hard to know right now though if this ability will be much of a game changer, as that will largely depend on how much lore typical location cards have