Of course not, the cards a monster
As long as a card exiled with this creature is a creature card, this creature has the power, toughness, and creature types of the last creature card exiled with it
Put the exiled cards on the bottom in a random order.) Enchantment Sarkhan's Unsealing Whenever you cast a creature spell with power 4, 5, or 6, this enchantment deals 4 damage to any target
Still, if he sticks around he can definitely give you card advantage and card selection with his other two abilities
But as we now know, what was thought to be powerful then is not the same as what we know to be powerful today
Reanimating four targets for 5 mana is phenomenal, even if you have to split your zombies across different players