That said, there are far worse red cards out there, and a duplication effect is always at least a little useful
Amazon.com: Pokemon Card - Black Star Promo #34 - Entei (Holo-foil) : Toys & Games
In the past, we would accomplish this by having to write out that the tokens left alongside the creature that made them
Similar rules apply: Look for the first-edition stamp and shadowless printing
Anafenza, the Foremost Ancestor's Embrace Archive Haunt Benevolent Geist Bone Rattler (playtest) Brinebound Gift Catlike Curiosity Chapel Shieldgeist Clever Distraction Covetous Geist Dennick, Pious Apparition Departed Soulkeeper Dorothea's Retribution Drogskol Armaments Dryad Militant Festival of Embers Forbidden Crypt Generous Soul Ghastly Mimicry Ghostly Castigator Gutter Shortcut Hades, Sorcerer of Eld Hook-Haunt Drifter Katilda's Rising Dawn Lanterns' Lift Leyline of the Void Luminous Phantom Morning Apparition Necrodominance Planar Void Rest in Peace Sinner's Judgment Spectral Binding Twinblade Invocation Valgavoth, Terror Eater Waildrifter Yawgmoth's Agenda Yawgmoth's Day Planner (playtest)
A popular combo with Darksteel Forge is Mycosynth Lattice, which turns all permanents in play into artifacts, and with the Forge out, all your permanents are now indestructible