The D4

Haste, Hexproof, Indestructible
{1}{b/r}{u}{g/w}{t}: Roll a D4. You gain 5 Life X times, where X is the result. If you roll a 4, you roll again and gain 5 Life X times, where X is the result. Repeat this process until you roll something other than a 4.
Eminence — While The D4 is on the Battlefield or in the Command Zone, whenever you roll a dice you may choose to reroll it, if you do you must keep the new result.