First printed in Gatecrash (2013)
Mind Grind 
Sorcery
Each opponent reveals cards from the top of their library until they reveal X land cards, then puts all cards revealed this way into their graveyard. X can't be 0.
Combos
1 combo from Commander Spellbook.
- Infinite mill for target opponent: Hive Mind + Mana Severance + Mind Grind + Opposition Agent
Legality
Constructed
- Standard Not legal
- Pioneer Legal
- Modern Legal
- Legacy Legal
- Vintage Legal
- Pauper Not legal
- Future Standard Not legal
- Historic Not legal
- Timeless Not legal
- Alchemy Not legal
- Penny Dreadful Legal
- Premodern Not legal
- Old School 93/94 Not legal
Singleton
- Gladiator Not legal
Commander formats
- Commander Legal
- Duel Commander Legal
- Pauper Commander Not legal
- PreDH Not legal
- Tiny Leaders Legal
- Oathbreaker Legal
- Brawl Not legal
- Standard Brawl Not legal
- Competitive Brawl Not legal