It can kill stuff that a normal Kill Tap can't because you can use stuff like Liliana, the Last Hope's -2/-1 to kill off something with indestructible
None of the pieces are bad cards to play by themselves, either, with even Doc Aurlock offering a solid blocker
The ability to store seven counters and then pull them off for mana any time you need is pretty sexy
If the Pokmon this card is attached to is in the Active Spot and is damaged by an attack from your opponents Pokmon (even if it is Knocked Out), put 2 damage counters on the Attacking Pokmon
In Commander, you'll be able to make good use of Final Showdown, paying six to destroy all creatures, one more when there's something important you want to protect, and one more when you want to get rid of some pesky indestructible stuff too
Add some much-needed extra value in Tinybones and Tergrid to make sure were actually moving toward victory with these discard spells and you have another strong way to build this archetype