Mark for Death
Mana cost
Mana value4TypeSorcery
Color identity
Red
RarityUncommon
SetGatecrash (GTC)
ArtistMathias Kollros
Price€0.04 · foil €0.37 · $0.14
Mark for Death 

Sorcery
Target creature an opponent controls blocks this turn if able. Untap that creature. Other creatures that player controls can't block this turn.
Everyone roots for the little guy, but nobody bets on him.
Legality
CommanderLegalStandardNot legalPioneerLegalModernLegalLegacyLegalVintageLegalPauperNot legalBrawlNot legalOathbreakerLegalHistoricNot legalTimelessNot legalPenny DreadfulLegal
Rulings
2013-01-24
That creature’s controller still decides which attacking creature it blocks.
2013-01-24
If the creature can’t block (perhaps because it has become tapped or it doesn’t have flying and all attacking creatures do), then the requirement to block does nothing.
2013-01-24
If there are any costs required for that creature to block (such as the one imposed by War Cadence), the creature’s controller isn’t required to pay those costs. In that case, the requirement to block would do nothing.