Errantry

Enchantment - Aura, 1R (2)
Enchant creature

Enchanted creature gets +3/+0 and can only attack alone.¹
"There is no shame in solitude. The lone Knight may succeed where a hundred founder." -Arna Kennerud, Skyknight
Illus. Scott Kirschner

Gatherer Card Rulings [Nov 2009]

• 10/1/2008: "Can only attack alone" means the enchanted creature can't be declared as an attacker during the declare attackers step unless no other creatures are declared as attackers at that time (either by you or your Two-Headed Giant teammate).
• 10/1/2008: If the enchanted creature attacks alone, then a spell or ability causes another creature to be put onto the battlefield attacking, that's fine.

Format Legality	Legal in Vintage, Legacy, MTGO Classic Banned in Extended, Standard
Printings (3/13)	Fifth Edition (Common) Ice Age (Common) MTGO Masters Edition II (Common)