Name:Foreboding Statue
ManaCost:3
Types:Artifact Creature Construct
PT:1/2
A:AB$ Mana | Cost$ T | Produced$ Any | Amount$ 1 | SubAbility$ DBPutCounter | SpellDescription$ Add one mana of any color.
SVar:DBPutCounter:DB$ PutCounter | Defined$ Self | CounterType$ OMEN | CounterNum$ 1 | SpellDescription$ Put an omen counter on CARDNAME.
T:Mode$ Phase | Phase$ End of Turn | ValidPlayer$ You | IsPresent$ Card.Self+counters_GE3_OMEN | TriggerZones$ Battlefield | Execute$ TrigUntap | TriggerDescription$ At the beginning of your end step, if there are three or more omen counters on CARDNAME, untap it, then transform it.
SVar:TrigUntap:DB$ Untap | Defined$ Self | SubAbility$ DBTransform
SVar:DBTransform:DB$ SetState | Defined$ Self | Mode$ Transform
DeckHas:Ability$Counters
AlternateMode:DoubleFaced
Oracle:{T}: Add one mana of any color. Put an omen counter on Foreboding Statue.\nAt the beginning of your end step, if there are three or more omen counters on Foreboding Statue, untap it, then transform it.

ALTERNATE

Name:Forsaken Thresher
ManaCost:no cost
Types:Artifact Creature Construct
PT:5/5
T:Mode$ Phase | Phase$ Main1 | ValidPlayer$ You | TriggerZones$ Battlefield | Execute$ TrigMana | TriggerDescription$ At the beginning of your first main phase, add one mana of any color.
SVar:TrigMana:DB$ Mana | Produced$ Any
Oracle:At the beginning of your first main phase, add one mana of any color.
