This will often leave you on the back foot, especially on the draw, constantly playing catchup to your opponents' early drops in aggressive decks
It does require a bit of a sink, as you must send cards from your hand or field to negate the effects of the opponent's Monsters
When Peer into the Abyss resolves, you are very likely to draw at least 30 cards, and if your commander Starscream, Power Hungry is on the board and you are the monarch, you're definitely blowing up one opponent's life
This can be as simple as casting a creature before you play the Sphere
Take this unique shell from ChelliD, who went 4-1 in a Standard Champs Qualifier with four copies of Golgari Guildgate: Creatures (4) Planeswalkers (14) Lands (25) Spells (17) 2 Thoughtseize 3 Abrupt Decay 1 Ultimate Price 2 Devour Flesh 2 Far 3 Hero's Downfall 2 Dissolve 2 Bile Blight Sideboard Its hard to measure precisely how much better this deck would be with such a simple upgrade, but I imagine it would be substantial