(See rule 405, Stack.) A spell remains on the stack as a spell until it resolves (see rule 608, Resolving Spells and Abilities), is countered (see rule 701.5), or otherwise leaves the stack
The primary way of winning now is to just deal a lot of damage and hope it's enough
Ajani Vengeant Armageddon Bear Umbra Bend or Break Bontu's Last Reckoning Boom // Bust Catastrophe Chaos Orb Cleansing Decree of Annihilation Desolation Angel Devastation Elspeth Tirel Eye of Singularity Fall of the Thran From the Ashes Impending Disaster Jalum Grifter Jokulhaups Landfill Mine Layer Myojin of Infinite Rage Obliterate Ravages of War Ruination Scourglass Solar Tide Strategy, Schmategy The Argent Etchings Urza's Sylex Wake of Destruction Winter's Chill Wrath of Leknif (playtest) Zacama, Primal Calamity
Relatively straightforward, Witchs Cauldron is all about getting what you want into the graveyard while having the side benefit of drawing a card
Here is an example App mode
6 Teachings Of The Archaics Teachings of the Archaics is a valuable tool to keep in your back pocketyour back pocket being your sideboard in this case