optimus prime card mtg (Darksteel Colossus) Magic the Gathering Proxy reveal Optimus Prime and shuffle it into its owners library instead. Optimus Prime, Hero Transformers Magic

Portable Hole was selected over other removal options because its another answer to indestructible threats such as Adantos Vanguard out of decks like RW Heroic

There are a ton of ways to maximize the mana generation of this card (cough elves), and the massive mana income you get from Gaeas Cradle can be used to fuel your swarm or to bring out big spells or giant monsters that green loves so much

Up until that point, no one had any inkling that Retro Frame artifacts would be the theme

But with great power, comes great

This becomes incredibly potent with fetch lands and other shuffle effects that will prevent you from redrawing those unwanted cards

Or you can use the standard combo with [casthaven]Karakas[/casthaven] to lock your opponents out of drawing anything good for the rest of the game