Standard or edh.

[Pirate John]

Untap
Draw; 17/6
Play tapped Maze's End
Tap3, chromatic lantern
Tap2, dreadbore targeting elspeth

Tapped out
Pass; 17/3

[Ieatfood7]

Scry. Draw.  Play mutavault. Attack with the first mutavault and the three 1/1 tokens. Make the mutavault unblock able with thassa. Cast another omenspeaker and scry 2. Pass

20/0

[Pirate John]

Next time, you might want to make mutavault unblockable before you declare attacks otherwise your opponent can still declare the block.

Block a token. Take 4 damage. 17-->13

[Pirate John]

Untap
Draw; 13/4
Tap4+lantern, Urban Evolution
Resolve?

13/3

[Ieatfood7]

Yup. I think you got this, but let's see.

And as long as I make in unblock able during the declare attacks phase and don't pass priority to let you go to the declare blockers phase, mutavault would stay safe. Sorry if that wasn't clear.

[Pirate John]

Evolution resolves; 13/6
Tapped RakdosGG
Tap2, Gatecreeper vine fetching OrzoGG
Resolve?
If resolves, play tapped OrzoGG & pass turn

13/4, if Gatecreeper resolves

[Ieatfood7]

Scry with thassa. Draw. Play {jace, architect of thought}. Use his -2 ability. {bident of thassa}. 2x {Sphinx's revelation}. How do you split them?

Also, how many guild gates are you missing on the board?

[Pirate John]

Izzet, rakdos, boros, Seles, Orzo, Maze's End on board... Along with hallowed fountain + temple garden + chromatic lantern

Pile1:
Sphinx Rev + sphinx Rev
Pile 2:
Bident

1mana open?

[Ieatfood7]

I take the bident. I have three mana up. Make one of the 1/1 unblock able and swing for 1

20/1

[Pirate John]

12/4

Which mana is open?

[Ieatfood7]

Hallowed fountain, mutavault, and an island.

[Pirate John]

Let me get this straight... Tap4 Jace, tap2 unblockable and 3 mana open still? Didn't know you had that much mana on board. I only count 7 lands

[Ieatfood7]

Oops, I confused myself. Sorry. Just hallowed fountain untapped.

Sorry.

[Ieatfood7]

I didn't count the unblock able mana

[Pirate John]

Untap
Draw; 12/5
Tap2+lantern+Maze's End for a GolgGG
Play Maze's End tapped
Tap5 Prophet of Kr

Pass, will untap lands on your turn
12/4