Name:Goldbug, Humanity's Ally
ManaCost:1 W U
Types:Legendary Artifact Creature Robot
PT:3/3
K:More Than Meets the Eye:W U
R:Event$ DamageDone | ActiveZones$ Battlefield | Prevent$ True | ValidTarget$ Human.attacking+YouCtrl | IsCombat$ True | Description$ Prevent all combat damage that would be dealt to attacking Humans you control.
SVar:NonStackingEffect:True
T:Mode$ SpellCast | ValidCard$ Card.YouCtrl | ValidActivatingPlayer$ You | TriggerZones$ Battlefield | Execute$ TrigConvert | ActivatorThisTurnCast$ EQ2 | TriggerDescription$ Whenever you cast your second spell each turn, convert NICKNAME.
SVar:TrigConvert:DB$ SetState | Mode$ Transform
DeckHints:Type$Human
AlternateMode:DoubleFaced
Oracle:More Than Meets the Eye {W}{U} (You may cast this card converted for {W}{U}.)\nPrevent all combat damage that would be dealt to attacking Humans you control.\nWhenever you cast your second spell each turn, convert Goldbug.

ALTERNATE

Name:Goldbug, Scrappy Scout
ManaCost:no cost
Colors:white,blue
Types:Legendary Artifact Vehicle
PT:1/3
K:Living metal
R:Event$ Counter | ValidSA$ Spell.Human+YouCtrl | Layer$ CantHappen | ActiveZones$ Battlefield | Description$ Human spells you control can't be countered.
T:Mode$ Attacks | ValidCard$ Card.Self | TriggerZones$ Battlefield | IsPresent$ Human.attacking+Other | Execute$ TrigDraw | TriggerDescription$ Whenever NICKNAME and at least one Human attack, draw a card and convert NICKNAME.
SVar:TrigDraw:DB$ Draw | SubAbility$ DBConvert
SVar:DBConvert:DB$ SetState | Mode$ Transform
DeckNeeds:Type$Human
Oracle:Living metal (As long as it's your turn, this Vehicle is also a creature.)\nHuman spells you control can't be countered\nWhenever Goldbug and at least one Human attack, draw a card and convert Goldbug.
