Found out I never really explained the combo anywhere so there it is:
Board state: You need at least a colored legendary that is U or B or W (or Okina) in play, Sissay and two U mana producer (most of the time the combo cost 5G(G/R)UU so 9 mana total. Cost one more if you need to use Okina or if Zur is in your hand so yeah it's pretty janky) .
Step 1: Play Concordant crossroad (or
Mass hysteria for more budget option) then play a mana dork that produce UBWRG (most of the time jegantha but can be
bloom tender/Faeburrow if you have a good enough board). Activate Sissay Ability to put Zur into the battlefield (that why you need at least one UBW (or use Okina ability) permanant other than Sissay in order to have a 5/5 Sissay which allow you to tuto Zur once you have zur.) Attack with Zur and cheat freed for the Real, enchant your dork, pay U to detap your dork, tuto for Kinnan, pay U to untap your dork, and you got Infinite colored mana without restriction from there (even with jagentha because you are gonna spend the U of jagentha to untap himself and kinnan produce you an unrestricted mana). Use this mana to play all the shrines in your hand, and use Sissay abilities to cheat all the other shrines in your deck, Hanna if you have somes shrines in graveyard, Ugin nexus, and Daretti. Sacrifice Ugin Nexus on the Daretti -1.
Step 2:
Step 3: Profits