The trigger event doesn't have to specifically refer to "creatures." In these cases, the trigger event may also refer to something being "put into a graveyard from the battlefield." For example, an ability that triggers "whenever an artifact is put into a graveyard from the battlefield" would trigger twice if an artifact creature dies while Teysa Karlov is on the battlefield
Without further ado, lets get to the list
So, why is Umbreon VMAX such a popular card
Its a lot easier to generate counters on some permanents than others, and so being able to redistribute them in partial amounts (without relying on dumping them all on the Ozolith when stuff dies) unlocks some nice gameplay synergies
The way it synergizes with most of the creatures youd probably be running in spellslinger and prowess decks is definitely cool, and it can definitely make some cards a big threat by doubling their triggered abilities
Powerful Gameplan with Limitations As a whole, Zhulodok decks are in a rather interesting position in cEDH