Related One of the benefits, though potentially the biggest drawbacks here, is that Sliver Gravemother is a five-color commander, meaning you have access to a lot of spells, but also, you may have some trouble getting the mana base sorted out
With most of the card choices figured out, I only had ten creatures, and that just wasn't going to be enough
Sorcery Neverwinter Hydra As this creature enters, roll X d6
The Destiny Board of Doom[] During this event, as an event opponent he has the skill "Destiny Board of Doom" at Level 40 and higher (at all levels prior to version 1.7), which lets him start the duel with "Dark Necrofear" in his Graveyard and the effect of the Destiny Board skill activated

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On the one hand, it's an incredible card advantage engine for all manner of spellslinger decks, from storm decks that want Past in Flames on a stick to decks that want to chain big spells like Time Warp and Aminatou's Augury