There are a few ways to get this card into play.
1. The Old-Fashioned Way - generate 1,000,000 mana. A
mana-engine combo would work. Try Urza's block Stalwart Palinchron
+ High Tide, the classic Power Artifact + Grim Monolith, etc. Of
course, you can crack open more Unhinged packs and try to pull a
Mox Lotus, which was basically designed to do this exact thing.
Also, here's a simple one you could use: Dimir Aqueduct + Freed
from the Real + Tidewater Minion.
With the Dimir Aqueduct in play, and Freed from the Real
enchanting the Minion:
You tap the Duct for UB. Then, use the Minion to untap the Duct.
Use the U you got from the duct to activate Freed from the Real's
effect and untap Tidewater Minion. Now you have B in your mana
pool, and all three of those key permanents are untapped! You can
repeat this process ad infinitum until you have all the mana in the
world.
2. Put it directly into play. Plenty of cards allow you to do
this; Tinker is the most obvious, but Arcum Dagsson and other cards
can do the same thing. If you're patient, give Jhoira of the Ghitu
a shot.
3. Reduce/replace its casting cost. Try Fist of Suns.