Add U, R, or W
Fine in elves, not so much elsewhere
Unsurprisingly, the same print facilities that WotC contracted to print Pokmon cards were also producing Magic cards, which led to this error
Tezzeret, Artifice Master Tezzeret, Artifice Master is a Planeswalker that could fit into many formats that have powerful artifact decks in Modern-Vintage formats
// Vigilance On turns where the effect of Summon: Yojimbo's second or third chapter ability is applying, your opponents can choose not to attack with a creature that must attack if able as long as there is no other player, planeswalker, or battle for that creature to attack that wouldn't require a cost
If a creature the defending player controls can't block the enchanted creature for any reason (such as being tapped), then it doesn't block that creature