Guff boosts a whole deck full of Planeswalkers, generating creature tokens as crucial blockers, restocking your hand, providing mana ramp and eventually building up to a devastating burn effect
I've always eyed Lotus Cobra, but every time I think about buying one I remember I have a fetch based cube, which means it accellerates to five mana on turn 3, and that's way ahead of the four mana you can ramp up to with every other ramp spell in my cube
The rest of the options either make mana for a Limited purpose (Like Beastcaller Savant whose mana can only be used for creatures) or something like Servant of the Conduit that turns energy into any mana
Ardyn Izunia Varragoth, Bloodsky Sire is a solid creature with deathtouch, decent stats, and a repeatable tutor
It's also strange for fans to consider that something so integral to the video games is now summarily ignored by the trading cards
OK sure, full on card draw would be better and the mana restriction is significant, but if you airbend at all, a of this artifact is perfect to replay those cards