Shilgengar, Sire of Famine | Mm'menon, Uthros Exile

Cards

All permanents on the battlefield (
Lesser Masticore without a -1/-1 counter on it).

Activate
Shilgengar by sacrificing
Lesser Masticore.
When
Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When
Lesser Masticore enters,
Mm'menon triggers, putting a +1/+1 counter on
Lesser Masticore.
Resolve the
Shilgengar ability, creating a Blood token.
When the Blood enters,
Mm'menon triggers, putting a +1/+1 counter on a creature you control.
Repeat.

This combo has been estimated to be Spicy (Bracket 3-4+).