Tazi, the two faced

When Tazi enters the battlefield, each player puts the top two cards of there library into there graveyard.
{u}{b}: Tazi until your next turn has the ability text of a creature in a graveyard and gains Tiza's ability text.
{r}{g}: Tazi until your next turn gain the power and toughness of a creature in a graveyard.
"Why lie to yourself when you can be anyone."