Oh yeah... This card.

It's pretty sick in an Ally deck, because it's whatever you want it to be, as long as you have the chosen creature on the board.

Sea Gate Loremaster is pretty sick and in the same color. Now you're only paying two mana for it. Kazuul Warlord is also a good card to use it with.
It really benefits from copying any ally. Need life, copy Ondu Cleric. Need mana, copy Harabaz Druid. Need mill, copy Halimar Excavator.

Great, but completely limited to ally decks. 4/5, probably would be 4.5 or even 5 if it wasn't a tribal card, but that'd be a tad too good.