Forum:Illegal Action Ruling

I have a ruling question around game state or gameplay based on a possible illegal action.

Opponent: Has The Immortal Bushi on the field in face up defense position. It's effect in question is "When this card is face-up on the field, it cannot be Tributed, except for the Tribute Summon of a Warrior-Type monster."

Me: I activate Monarchs Stormforth magic card to tribute his monster to summon a non-warrior type monster.

Opponent: Calls the invalid action out as I cannot summon a non-warrior monster.

My question is, 1. Is this considered an invalid move on my card in which case we would rewind back to the last legal game state which would have been before me playing Monarchs Stormforth or,

2. Rather my activation is valid but his Immortal Bushi simple invalidates my activation and thus my Monarchs Stormforth is simply discarded to the graveyard?

Shuuby Doo (talk • contribs) 21:39, July 22, 2019 (UTC)