Meklord Astro the Eradicator — Ruling

Effetto 0

When resolving this effect, you choose whether to add the targeted monsters to your hand or Special Summon them. (If you targeted 2 or more monsters, you must either add all of them to your hand or Special Summon all of them.)
This card's effect that either Special Summons up to 3 "Meklord" monsters from your Graveyard or adds them to your hand is the effect that applies by activating this card. (It targets 1 to 3 "Meklord" monsters with different names in your Graveyard. It cannot be activated during the Damage Step.)

This card's effect that destroys a Synchro Monster on your opponent's field and inflicts damage to your opponent is an effect that activates in the Graveyard. (It does not target. It can be activated optionally during either player's turn, but cannot be activated during the Damage Step. Banishing this card from your Graveyard is the cost to activate this effect.)
Destroying a Synchro Monster on your opponent's field and inflicting damage to your opponent happen simultaneously.