The DM chooses the
Nature of the intervention
; the Effect of any Cleric spell or Cleric domain spell would be appropriate. If your deity intervenes, you can't use this feature again for 7 days. Otherwise, you can use it again after you finish a
Long Rest.
At 20th level, your call for intervention succeeds automatically, no roll required.
Read the second line. It expressly allows for the casting of ANY cleric spell (of which Gate is).
''Bahamut, I beseech you to Gate in The Sorcerer King (or whatever your stupid PC is named this time) adjacent to me in my Temple so he can suffer the retribution he deserves''
In any event, I can just cast the Spell myself. It appears on the Cleric list.
Swap an ASI of +2 to Strength for the Metamagic Adept (Subtle) Feat.
I cast
Temple of the Gods (blocks Divination) for a year on
Hallowed (Blocks teleportation and dimensional travel to non followers of my God) area of land in Celestia. The Temple is a 10' x 5' room with a door behind me (that only I can open, thanks to Temple of the Gods). Its surrounded on all sides by 550' of stone.
I cast
Heroes Feast (6th),
Death Ward (4th) and
Aid (upcast to 7th level) and then cast
Gate and you appear adjacent to me, and in the square in front of me, with me between you and the door.
We then roll initiative. I have +7 and a Lucky re-roll up my sleeve. You're at +2 to initiative (with no re-roll).
Presuming I win initiative (as I should) I cast Subtle metamagic
Anti-magic-field as my Action. It cant be counter-spelled as it was cast Subtly.
Is that better for you?
Also, its now your turn. What do you do?