If left unchecked, Web of Life and Destiny can snowball fast digging five deep and putting a creature straight onto the battlefield each combat
It can be nullified if the creature is removed before the spell resolves, however, so be careful casting this into open mana
Virtue of Knowledge is exactly that, and its got an adventure tacked onto it to allow you to copy an activated or triggered ability you control
Click the cards in the lower part to add them to your deck
Depending on what color combination you're playing in Commander, you may not easily have another Blue card ready, but if you do, it's killer
Alms of the Vein Archfiend of Spite Asylum Visitor Big Game Hunter Biting Rain Brain Gorgers Brink of Madness Call to the Netherworld Curse of Fool's Wisdom Dark Withering Descent into Madness From Under the Floorboards Gibbering Descent Gisa's Bidding Gorgon Recluse Grave Scrabbler Hell Mongrel Ichor Slick Kitchen Imp Markov Baron Muck Drubb Murderous Compulsion Necrogoyf Nightshade Assassin Psychotic Episode Psychotic Haze Shadowgrange Archfiend Strength of Lunacy Twins of Maurer Estate Voldaren Pariah Weirded Vampire