Cyclops Superconductor

Prowess and a death-triggered burn payload sit uneasily together, and that tension is the whole design: the keyword rewards you for protecting the body while the death clause rewards you for spending it. The energy sequencing resolves the conflict. It enters banking exactly three counters, precisely the toll its death ability demands, so the creature arrives having already funded its own funeral. Pump it with a couple of cheap spells, trade it in combat or feed it to removal, then cash the three energy to sling its final power at anything on the board or an opposing face. Any prowess trigger stacked on before it dies rides along into the damage, which turns a modest three-mana body into a delayed burn spell that scales with how hard the opponent tried to kill it. The catch lives in the energy itself. It is a shared, spendable pool, so a deck built around other energy sinks has to decide whether this creature's death check ever gets funded at all: the three counters it hands you can just as easily go toward a bigger payoff elsewhere, leaving the death trigger to fizzle for lack of currency. That is the friction worth building around. Left to die with the energy already spent, it deals nothing and the payload is wasted; hoard the energy and it becomes the most dangerous chump-blocker in the deck. The reward lives in the narrow band where you have three energy in reserve and a target that makes the trade lopsided.