Its not quite as powerful costing 2 mana instead of 1 but I still rate it as a flexible, limited counterspell
Toph, Hardheaded Teacher earthbends 2 instead of 1 if you cast lesson spells
Since each Shrine is legendary, it's impossible to have multiples of one on the battlefield at once, making them incredibly hard to build around in 60 card competitive formats like M:TG Standard
I already have my tickets to go, and if you want to join in you can use Wizard of the Coasts official events finder to locate your closest game store
Green is also exceptional at creating an immense mana advantage, typically with cheap cards like mana dorks (Llanowar Elves, Badgermole Cub) and land-based ramp, which is pretty unique to green (Rampant Growth, Cultivate)
Pretty sweet, really