The Tentacled One
I'll actually put my last untapped mana source to use and sac Launch to Claws of Gix. But I have no further responses and of course I'll choose Ramses Overdark to stay alive. So Launch goes back to my hand, I gain 1 life, and then Shadowmage Infiltrator and Phyrexian Gargantua will die on by side of the board. Stinging Licid and Despondency will also go to my graveyard once their creatures bite the dust, but then Despondency will go back to my hand.