Shaman of the Eons Passing

Lifelink
Convert 4(This card's converted mana cost is 4)Intern(Whenever you cast a spell, you may exile this card from your hand. If you do, you may pay {x} at any time to put X Time counters on it. When the amount of Time counters are more than or equal to its converted mana cost, you may cast it from exile without paying its mana cost)