Okay, just making sure.
I pay 6 more life to Bargain. I'm at 9. I tap Rootwater Depths to play Blood Pet, I sacrifice the Blood Pet for B.
I tap Mana Crypt and the Thran Quarry to play Frantic Search, discarding Glimmervoid and Tropical Island and untapping my lands. I tap the Rootwater Depths for 1 and use the B I have floating to play Cabal Ritual, bringing my mana up to BBBBB and the storm count up to 6.
I drop Lotus Petal. I use the Lotus Petal for U and cast Yawmoth's Will with black mana. Now I have UBB and the storm count is 8.
Out of my graveyard, I play Cabal Ritual. I have UBBBBB in my mana pool and the storm count is 9.
Out of my graveyard, I play Dark Ritual and Blood Pet. Now I have UBBBBBB. Storm count: 11.
Out of my graveyard, I play Land Grant, revealing Night's Whisper, Tinker, Rebuild, Windfall, and Feldon's Cane. Land Grant fetches nothing. Storm count: 12
Out of my graveyard, I cast Lotus Petal. Storm count: 13.
I play Tinker, sacrificing Mana Crypt to fetch Memory Jar. Mana: BBBB. Storm: 14.
I activate Memory Jar. We both set aside our old hands and get new ones. I play Black Lotus. I play Tendrils of Agony at you, which triggers its storm and makes 15 copies of the Tendrils, all pointed at you.