As for The One RingThe One Ring, holding up seven mana to cast it at instant speed is a lot, but in general with an Alchemist's RefugeAlchemist's Refuge in play, you can just pass turn and hold up all of your lands fairly fearlessly
While this card sadly doesnt ping whenever a creature enters on your side of the battlefield, getting this trigger on casts is nearly as good, and it will surely aid you in filling up your hand with more threats so you can employ all that mana, which Elves are so good at producing
It's a nicely flexible spell that does a great job of protecting more than your creatures
Call of the Ring Call of the Ring is a 2-mana way to get the Ring tempts you triggers for free
A player needs to do something with all the mana generated from the Bloom and from Squandered Resources
Ursula, Deceiver of All Wow, talk about a villain that really has it all