A Tooth and Nail that grabs [card]Avacyn, Angel of Hope[/card], and [card]Archetype of Endurance[/card] creates an obscene advantage and thats one of the more fair uses for the card
Goddric has also been adopted by Rakdos Sacrifice and Rakdos Burn
You can only use this effect of "Speedroid Colonel Clackers" once per turn
Unless your list is full of Faithless Looting, Vryn's Prodigy and Brainstorm this doesn't seem worth it
The light test Also long popular is the light test, which requires you grab a torch, turn off the lights, and shine the light directly at the card, then shine it at a genuine card for comparison
Card Text If this card is Normal or Special Summoned: You can send 1 "D/D" or "Dark Contract" card from your Deck to the GY, except "D/D Savant Copernicus"