Subtype/Ability or maybe ruleset? Inscripted

[Loleo]

Inscripted

The player that controls Inscripted monsters can't control non-inscripted monsters. While either player controls an inscripted monster:

• instead of the game ending when one player has 0 LP the game ends when one player has reached 0 LP and their opponent has 5000 or more LP then they do (LP can be negative)
• Monsters can't be destroyed by battle, all monsters must Attack the monster in front if able or directly if no monster is in front (even if in Defense position)
• If a monster is Attacked it loses DEF equal to the opposing monster's ATK and if it's DEF hits 0 it is destroyed.
• All battles involving 2 monsters are treated as attacking a Defense position monster

I got really into the new game Inscription and decided to try a mashup of the 2 games. Looking Forward to the weird synergy.

[Dokutah]

game mashing is something i tried in past

...and its dogdamn difficult lol

the best take is completely different format/rules

but if you want to truly integrate yugioh and the other game though. as in either some how the cards warp pre-existing game into another OR simply convert the both sides of field to the theme gimmick (like Kaijus actually). well there some combination i done:

"At start of Draw Phase of your 1st turn in the duel, Reveal this card in your possession: [apply 1 piece of the rule]". this effect cannot be negated also your opponent cannot respond to this effect activation"