A creature with Protection from a quality, let's say a colour for simplicity, can't be targeted by spells and abilities of that colour (like Shroud, that's regardless of who controls them)
Format: Day 1: 7 rounds of Swiss, Top 8 Single-Elimination, Top 4 players advance to Day 2 Day 2: Top 4 Single-Elimination WCS2024 Forbidden & Limited Card List 1st, Ruben Andres Penaranda (US) [Fiendsmith Yubel] Source: Inspire TCG 2nd, Mark Solis (US) [Fiendsmith Snake-Eye] Source: Zach Butler YGO 3 4th, Jose Luis Santiago Torres (US) [Fiendsmith Snake-Eye] Source: JNC Collectibles 3 4th, Kondo Yuto (JP) [Fiendsmith Snake-Eye Fire King] Source: @garamu623966111 5 8th, Zhang Jiawei (CN) [Tenpai Dragon] Source: LTM 5 8th, Julio Valls (ES) [Ritual Beast] Source: Julio Valls 9 28th, Lim Dawn (KR) [Fiendsmith Yubel] Source: @Cinnamon_yp 9 28th, Fox Chudleigh (AU) [Fiendsmith Snake-Eye] Source: Australian Yu-Gi-Oh
One mana turns into two the first turn you bring it into play, and then you just get two colorless mana every turn thereafter
You can easily slam this on turn 4 and get four mana back, making it effectively free to cast