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K:
-3 GSZ
-1 Knight of Autumn
+1 Goyf
+3 Daze

Without GSZ, there are few sources of fodder so Oko's green Food/Astrolabe Elks become relevant.

To get Dryad Arbor or other dorks for NO fodder, since the creature count is low. Or ramp T1 Arbor when you don't have Noble.

Also to fetch toolbox tools like Knight of Autumn (maindeck) or other...

So you mean something like this?

sNOwKOnes.dec


//Creatures: 14
4 Noble Hierarch
4 Ice-Fang Coatl
3 Tarmogoyf
1 Knight of Autumn

You want a lot of snow basics for both Ice Fang and Astrolabe (and not losing the game to Wasteland). The deck looks predominantly UG early.

Try something like this:

//Lands: 21
4 Prismatic...