Game:

Dark Rose Valkyrie (2016)

Duration: 4:56

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Dark Rose Valkyrie - Experiment Beta DLC boss battle (Very Hard), done by SoraKun85.

This is the 2nd DLC boss of the final EX dungeon's B4 floor.
This boss is really hard as requires a good strategy setup and a good equip and some RNG luck and it's way stronger than Banana Demon.
I had to raise Agility to be able to beat it without too much efforts, otherwise the chance to beat it relying on RNG luck is really really low.

Strategy used:

Find Experiment Beta with only 2 rare enemies (it can have up to 3), the one in the back-row has no formation effects, so kill it first.
It has a really bad passive that sometimes (a lot of times) triggers auto-guard, you may be able to kill it in one turn if it doesn't trigger.
You want to kill it with ice attacks as ice is its weakness and it's pretty resistent to everything else, in the meantime stun-lock the other enemies.
By the time the back-row enemy is dead, IIRC the second rare enemy formation effect is gone (it grants def up small effect), so kill it.
As last stun-lock the Experiment Beta and defeat it with the usual special attacks (formation effect should be gone even for it).
I used a wide formation since Experiment Beta's special is an AoE attack.

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