Whenever another creature you control dies, put a +1/+1 counter on Gorma.
Nontoken creatures you control enter with an additional +1/+1 counter on them for each creature that died under your control this turn.
Gorma turns your dead creatures into a snowballing engine: sacrifice and trade away tokens and bodies to grow Gorma and to pump every nontoken creature you cast later that turn. You build an aristocrats board, loop sacrifice fodder for value and life drain, and close with a huge lifelink Gorma or oversized creatures, often in a single explosive turn.
Lifelink plus constant counter growth makes Gorma a resilient, evasive-by-size threat that races life totals
Rewards aristocrats sacrifice loops you already want to play in Golgari
Stacking deaths in one turn makes late nontoken creatures enter enormous, enabling burst commander damage
Black and green offer the best recursion, tutors, and token generators to feed it
Heavily commander-dependent; without Gorma the counter payoff disappears and the deck stalls
Vulnerable to graveyard hate and to removal that exiles rather than kills
No native evasion or trample, so a big Gorma can be chump-blocked forever
Needs a steady stream of fodder and sac outlets to function, making it engine-fragile
A nontoken payoff that enters massive after a death-heavy turn and provides trampling beef.
Add fast mana and a tutor package (Demonic Tutor, Diabolic Intent) to assemble sac-outlet-plus-payoff lines sooner. Lean into doublers and proliferate (Doubling Season, Hardened Scales, Inkmoth-style proliferate) plus reliable trample enablers so big creatures actually connect. Finally, install a tight aristocrats combo such as Pitiless Plunderer with a free sacrifice outlet and a Blood Artist effect to convert the death engine into a deterministic kill.