edhseer Commander synergy, explained
Legendary Creature — Cat Nightmare Beast
Mana cost: {2}{W}{B}{G}
Mutate {4}{G/W}{B}{B}
Deathtouch, lifelink
Whenever this creature mutates, return any number of target creature cards with total power 10 or less from your graveyard to the battlefield.
triggered — brings a card back
Causes: put a creature onto the battlefield, a creature leaves a graveyard.
Cares about: a creature in a graveyard.
a Cat deals combat damage — 293 cards in Nethroi's colors can cause this (Nethroi is one).
a Cat attacks — 293 cards in Nethroi's colors can cause this (Nethroi is one).
a nontoken Cat enters the battlefield — 294 cards in Nethroi's colors can cause this (Nethroi is one).
a Cat it grants abilities to — 298 cards in Nethroi's colors can cause this.
297 other cards cause it too. These are the ones with the most connections.
a Cat enters the battlefield — 309 cards in Nethroi's colors can cause this (Nethroi is one).
When Nethroi, Apex of Death enters:
a Beast enters the battlefield — 410 cards in Nethroi's colors can cause this (Nethroi is one).
When Nethroi, Apex of Death enters:
a creature leaves a graveyard — 1,037 cards in Nethroi's colors can cause this (Nethroi is one).
When Nethroi, Apex of Death leaves a graveyard:
3 other cards care about it too. These are the ones with the most connections.
life is gained — 1,782 cards in Nethroi's colors can cause this (Nethroi is one).
When Nethroi, Apex of Death gains life:
77 other cards care about it too. These are the ones with the most connections.
anything leaves a graveyard — 1,806 cards in Nethroi's colors can cause this (Nethroi is one).
When Nethroi, Apex of Death leaves a graveyard:
1 other card cares about it too. These are the ones with the most connections.
a creature attacks — 10,028 cards in Nethroi's colors can cause this (Nethroi is one).
When Nethroi, Apex of Death attacks:
105 other cards care about it too. These are the ones with the most connections.
anything attacks — 10,028 cards in Nethroi's colors can cause this (Nethroi is one).
When Nethroi, Apex of Death attacks:
55 other cards care about it too. These are the ones with the most connections.
a creature blocks — 10,028 cards in Nethroi's colors can cause this (Nethroi is one).
When Nethroi, Apex of Death blocks:
16 other cards care about it too. These are the ones with the most connections.
a creature enters the battlefield — 11,299 cards in Nethroi's colors can cause this (Nethroi is one).
195 other cards care about it too. These are the ones with the most connections.
anything enters the battlefield — 15,604 cards in Nethroi's colors can cause this (Nethroi is one).
22 other cards care about it too. These are the ones with the most connections.