In reality, both doors are correct and the brothers are able to change the correct door at will
Chart shows the price of Psyduck #12 at the end of each month going back as long as we have tracked the item.
Unchained Soul of Rage and Unchained Soul of Anguish both can add back a Fiend from grave if they are destroyed while Rage is able to Link Summon with an opponent's monster on their turn while Anguish can Link Summon using an opponent's monster on your turn
You can add cards like Herald of Orange Light to your hand that can activate from the hand to negate your opponents effects, which are sure to be tactics you can like in tandem with Power Angel Valkyria!] Spell & Trap Cards That Bolster Tactics Also Appear
Im pretending its for research. You can decide your own excuse
Third of all, it'll tap lock something for two turns like, say, their Commander, triple nice