CardName: Myr Incubation Pit
Cost:
Type: Land
Pow/Tgh: /
Rules Text: Myr Incubation Pit enters the battlefield tapped.
When Myr Incubation Pit enters the battlefield, put a 1/1
colorless Myr artifact creature token onto the battlefield.
{T}: Add {1} to your mana pool.
Flavour Text:
Set/Rarity: Link's Unplaced Cards Uncommon
Myr Incubation Pit
U
Land
Myr Incubation Pit enters the battlefield tapped.
When Myr Incubation Pit enters the battlefield, put a 1/1 colorless Myr artifact creature token onto the battlefield.
: Add to your mana pool.
: Add 
to your mana pool.
Wow. Interesting take on Memnite (or Gods' Eye, Gate to the Reikai). Or on Manakin.
Actually, it's Khalni Garden that I was going for, but now that you mention in, I see all of those other things, too.