General Tazri [Oath of the Gatewatch]

Description

Set:	Oath of the Gatewatch
Type:	Legendary Creature — Human Ally
Rarity:	Mythic
Cost:	{4}{W}

When General Tazri enters the battlefield, you may search your library for an Ally creature card, reveal it, put it into your hand, then shuffle your library.
{W}{U}{B}{R}{G}: Ally creatures you control get +X/+X until end of turn, where X is the number of colors among those creatures.