manifest mtg cards Dread Mechanic Guide - How To Use, Best (Look at the top two cards of your library Growing Dread MTG - Duskmourn:

Instant Color tag templates(None) Mindbreak Trap If an opponent cast three or more spells this turn, you may pay rather than pay this spell's mana cost

I expect it to see a lot of play

However, the access to red also gives players access to damage doubling cards

Artifact - Equipment Color tag templates(None) Fleetfeather Sandals Equipped creature has flying and haste

However, W/R Prison also has perhaps the best sideboard in the entire format

Number 135 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless