convoke mtg cards How to design a custom Magic: The Gathering card with mechanics? A card for each color

My girlfriend has a gnarly Korlash, Heir to Blackblade voltron deck

+ 3 Nourishing Shoal, 3 Autochthon Wurm 3 Boseiju, Who Shelters All, Inquisition of Kozilek / Goryos Vengeance / Through the Breach / Time of Need / Wild Guess Theyll likely have Grafdiggers Cage, Leyline of Punishment, or Rain of Gore

You can't choose to lock a door that's already locked with such an ability

During a game, ignore any printed parts of Built Bear's rules text that isn't circled except for the legacy ability

Since the printing of Thassas Oracle, Ive seen this card quite a bit more frequently, although there was a time where this was nothing more than a very risky tutor effect