Name:Eye of Ojer Taq
ManaCost:3
Types:Artifact
A:AB$ Mana | Cost$ T | Produced$ Any | SpellDescription$ Add one mana of any color.
K:Craft:6 ExileCtrlOrGrave<2/Permanent.Other+withSharedCardType/permanent>:two that share a card type:the two
AI:RemoveDeck:All
DeckHints:Ability$Discard|Mill|Sacrifice
DeckHas:Ability$Mill|Graveyard|Token
AlternateMode:DoubleFaced
Oracle:{T}: Add one mana of any color.\nCraft with two that share a card type {6} ({6}, Exile this artifact, Exile the two from among other permanents you control and/or cards from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

ALTERNATE

Name:Apex Observatory
ManaCost:no cost
Types:Artifact
R:Event$ Moved | ValidCard$ Card.Self | Destination$ Battlefield | ReplaceWith$ ETBTapped | ReplacementResult$ Updated | Description$ CARDNAME enters tapped.
SVar:ETBTapped:DB$ Tap | Defined$ Self | ETB$ True
K:ETBReplacement:Other:DBChooseType
SVar:DBChooseType:DB$ ChooseType | Type$ Shared | TypesFromDefined$ ExiledWith | AILogic$ MostProminentComputerControlsOrOwns | SpellDescription$ As CARDNAME enters, choose a card type shared among two exiled cards used to craft it.
A:AB$ Effect | Cost$ T | StaticAbilities$ Play | Triggers$ CastTrig | SpellDescription$ The next spell you cast this turn of the chosen type can be cast without paying its mana cost.
SVar:Play:Mode$ Continuous | MayPlay$ True | MayPlayWithoutManaCost$ True | MayPlayDontGrantZonePermissions$ True | EffectZone$ Command | Affected$ Card.ChosenType | AffectedZone$ Hand,Graveyard,Library,Exile,Command | Description$ The next spell you cast this turn of the chosen type can be cast without paying its mana cost.
SVar:CastTrig:Mode$ SpellCast | ValidCard$ Card.ChosenType | ValidActivatingPlayer$ You | Execute$ ExileSelf | Static$ True
SVar:ExileSelf:DB$ ChangeZone | Defined$ Self | Origin$ Command | Destination$ Exile
Oracle:Apex Observatory enters tapped. As it enters, choose a card type shared among two exiled cards used to craft it.\n{T}: The next spell you cast this turn of the chosen type can be cast without paying its mana cost.
