spell cards in yugioh Ruler 25th Anniversary Rare Horn of the Unicorn SRL-EN054 Special Summon it to your field 10 Most Overpowered Yu-Gi-Oh! Cards

Most often incorporating Black, these decks can be difficult to deal with, as discarding effects directly cut down how many answers a player can access at once, often making a matchup against a discard deck feel like an uphill battle

The real problem is with the flavor

I do not agree with your point about OPAgent not needing to be immediately interacted with-because I do think decks where tutoring is a central part in the game plan will be destroyed by this card

It's basically Gaea's Cradle on a 3-drop creature

(This card can attack on the turn in which it is played.) Card Set(s) -Kingdoms of Intrigue- [OP-04] CARD VIEW OP04-119 | SEC | CHARACTER Donquixote Rosinante Attribute Special Block Icon 1 Type Navy/Donquixote Pirates Effect [Opponent's Turn] If this Character is rested, your active Characters with a base cost of 5 cannot be K.O.'d by effects