Garys best in heavy black decks running life drain synergies or alongside other drain effects like Sanguine Bond and Ayara, First of Locthwain
Besides, your opponent will probably try very hard to kill this in combat on its second attack, throwing plenty of blockers in its way, giving you the opportunity to wreck them with Built to Smash or the like
Assuming that I add a card to my inkwell every turn and that five-drops are superior to four-drops, I will never have a good chance to play that weaker four-drop, so its the perfect ink fodder
You can also add up to two more friends with decks to your side, for a total of four players
It's automatically activated a few minutes later, and you can take advantage of the benefits and discounts
Creature removal for green and blue, enchantment removal for black and red, hand disruption for the non-black decks etc