Merciless Mutant Deity, Darkface Card Review!

Merciless Mutant Deity, Darkface

[Stride]-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] Stride this card on your (VC) from face down.

[ACT](VC)[1/Turn] Dark Device (Active when your opponent has no [Stand] units in the same column as this unit):[Counter Blast (1) & Choose a face down card from your G zone, and turn it face up] Choose up to the same number of your opponent's rear-guards as the number of face up cards named "Merciless Mutant Deity, Darkface" in your G zone, until end of your opponent's next turn, they get "[CONT](RC):This unit cannot intercept, and cannot be chosen due to the cost or effect from your cards.", and for each rear-guard chosen with this effect, this unit gets [Power]+5000 until end of turn.

Dark Device is the new ability for Megacolony and the skill can be activate when your opponent has no Standing units in the same column as the unit with Dark Device skill. Many getting confuse from Merciless Mutant Deity, Darkface skill. Yeay so do I at the first time, especially the second CONT skill where your opponent's rear-guard "cannot be chosen due to the cost or effect from your cards."

What kind of costs and effects are you unable to choose the unit for due to the "cannot be chosen due to the cost or effect from your cards" ability given by "Merciless Mutant Deity, Darkface"?

Here is the answer I got from wikia. If the text has "choose" written, then you become unable to choose it. If the text does not have "choose" written, the unit can receive your costs or effects. "Stand all of your rearguards" doesn't have "choose" written, so you are able to stand it. The cost "put this unit into your soul" doesn't have "choose" written, so you are able to put it into your soul. The ability "during this battle, retire the boosted unit" doesn't have "choose" written, so you are able to retire.

Basically, Its all about the text. You will have to read it carefully before assuming that all your rear-guards are stunned and hopeless.

If a unit is given the "cannot be chosen due to the cost or effect from your cards" ability by "Merciless Mutant Deity, Darkface", can it be given effects from triggers? No, it cannot since unit cannot be chosen for trigger effect and trigger effect is also consider as card effect.

Stride this G unit over Intimidating Mutant, Darkface can make it's skill more usable unless your opponent decided not to attack with his/her vanguard during the turn before you use this G unit.