Legality depends on the tournament format -- Oracle of Mul Daya can be legal in some formats and banned or restricted in others
I've either been happy using the other two abilities over again, or I've been able to ult but have declined because there wasn't enough value in my graveyard to make it worthwhile
WotC owns the rights to the cards artwork , either through first printing rights (most likely) or full purchased rights (less likely)
Mega Mewtwo EX is a Destructive Force of Nature Pokemon TCG Marketplace BREAKthrough If there is any Stadium card in play, this attack does 50 more damage, and this attack's damage isn't affected by Resistance or any effects on your opponent's Active Pokmon
We did this with about 400 cards once and it took maybe an hour and a half, way faster than looking each one up manually
So when the Japanese source material actually had a card called "Skull Knight", they had to slap the #2 moniker onto it