colorless + lands

Greylands (U)
land-desert

Spells you cast cost 2 more.
whenever you cast a spell put a storage counter on Greylands.

“The Greylands boarder every nation. Its almost as though the Builders were trying to keep us separated.” - Erin, Sunspire storyspinner.

Greyland Boarder (U)
land-desert

Spells you cast on during your opponents turn cost 1 more.
whenever you successfully cast a spell during your opponents turn put a storage counter on this land.

“The Greylands drain mana from anyone who steps upon them, this has kept the peace, until now” - One Eye Minotaur Patriarch
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Greylands Stalker 11 (r)
Artifact creature- Golem
Haste, First Strike, Fear
Greyland Stalker costs 3 less for each storage counter on Deserts you control.
8/4
The worst part about the Greylands isn't the mana drain it's the stalkers. Unfortunately not many survive a once they figure that out.

Greylands Extractor 4 (U)
Artifact creature- Golem
Vigilance
~ costs 2 less for each storage counter on deserts you control.
When ~ enters the battlefield put a storage counter on target desert.
1/1
"What are is that thing putting into the sands?"
"Just hurry up before a Stalker comes."

I understand that the lands and that Golem interact, but those lands are terrible if you don't draw any creatures that have cost reduction from storage counters. Perhaps give those lands the ability,

"(T): Remove X storage counters from Greylands/Greyland Border. Add (U) to your mana pool for each storage counter removed."

-or-

"(T): Remove a storage counter from Greylands/Greyland Border: Add (U) to your mana pool."

You could even go as far as to have them produce other types of mana once you get into rare lands.

vince the greylands have an interaction with alot more, and the point of them is to be useless on their own. but some of the big cards of the set have really big interaction with them... ill spoil them in the near future. put suffice to say they arn't gonna be dead pulls in the end.