The Southern Air Temple is a White legendary Shrine that places a number of +1/+1 counters on each creature you control equal to the number of Shrines you control when it enters play and adds another +1/+1 counter to every creature any time another Shrine enters play under your control
Maybe Rofellos, Llanowar Emissary, but even then its significantly more powerful than a typical mana dork in the right deck
Death with Benefits ( Chasm Skulker, Dragon Egg, Rukh Egg, Roc Egg, Matter Reshaper, Sprouting Thrinax, Tuktuk the Explorer, Academy Rector, Aura Thief, Corpse Augur, Mindslicer, Reef Worm, Solemn Simulacrum, Archon of Justice, Seedguide Ash, Destructor Dragon, Deadwood Treefolk, Scuttling Doom Engine, Wurmcoil Engine, Symbiotic Wurm
This card game would bring in new generations of players into the world of TCGs, which at that time was dominated by the ever-popular Magic: The Gathering
Strike It Rich and Tavern Scoundrel offer fixing for your third color while spinning off a couple cheap artifacts to help out any U/W cards you grab
