If you have a "Koa'ki Meiru Urnight" on your field and don't want it to be destroyed, but don't want to discard an "Iron Core" from your hand to save it, use its effect to Special Summon this card, then let this card be destroyed to keep "Urnight" alive.
Using the strategy above with "Iron Core Specimen Lab" will not only allow your key monsters to survive but it will also search for another monster of the same type allowing you to use it for the maintenance cost.
Since this is the only Koa'ki Meiru monster whose self-destruction is part of its effect, and not a maintenance cost, it is an easy method of summoning the Meklord Emperors.
Use a single copy of this card to keep several "Koa'ki Meiru" monsters with different maintenance costs alive for one turn. This is much easier than discarding multiple cores and revealing different monster types in your hand.
Whenever possible, try to use "Koa'ki Meiru Crusader's" effect to return this card to your hand and normal summon it again each turn to keep your other monsters active continuously.