In that case, this card allows you to draw extra cards and keep some card advantage
Fun fact: Melmetals body is made of a special alloy that can reassemble itself when damaged
While Necrodominance is on the battlefield under your control, abilities that trigger whenever a permanent you own is put into your graveyard from the battlefield (for example, "When this creature dies") won't trigger because cards and tokens are never put into your graveyard
Aboleth Spawn's ability cares only about triggered abilities of the creature that's entering, not abilities of other permanents that trigger when that creature enters the battlefield
If this card is Fusion Summoned: You can banish 1 "Infernoid" monster from your GY
When it destroys a monster in battle, you can special summon any Blackwing monster with 1500 or less attack from your deck to your side of the field, with its effects negated