This card can be used along with "Iron Core Specimen Lab" as it can Special Summon other "Koa'ki Meiru" monsters that you need for certain conditions. Then, during your End Phase you can throw away your "Koa'ki Meiru" monsters that don't you don't need and protect your "Koa'ki Meiru" monsters that you have Special Summoned by "Koa’ki Meiru Urnight".
Two copies of this card can set a high damage setup. Simply Special Summon two "Koa'Ki Meiru" monsters with two "Urnights" and either attack for the game OR tribute three monsters for "Beast King Barbaros", clearing the field. Then, if you want to OTK, you can discard Iron Core to Special Summon "The Tricky", play "Urgent Synthesis" to get back one of the tributed "Meirus" and attack for the game.
A powerful play can be made if you activate "Cold Wave" and follow up by Special Summoning "Koa'ki Meiru Urnight"/"Koa'ki Meiru Maximus". It can be made even more deadly if "Urnight" was already on the field when "Koa'ki Meiru Urnight" resolved: you could Normal Summon another "Koa'ki Meiru Urnight" and Special Summon another monster with his effect preferably one of the rock triplets to lock you opponent out of the game come their next turn provided that you didn't end the game earlier.