Then when your opponents' stuff enters the battlefield, no triggers happen
Tragically, Sartoriuss final duel was interrupted many times, frustrating many fans and robbing this villain of his popularity
Will is not mandatory as such, but it could win you games at the right moment
Ascended Lawmage Augury Adept Aven Mimeomancer Azorius Guildmage Azorius thermage Deepway Navigator Deputy of Acquittals Deputy of Detention Elite Guardmage Epistolary Librarian Ethersworn Shieldmage Genku, Future Shaper Glamer Spinners Hama Pashar, Ruin Seeker Hope Estheim Ith, High Arcanist Jubilant Skybonder Kangee, Aerie Keeper Kangee, Sky Warden Krile Baldesion Kwain, Itinerant Meddler Kykar, Zephyr Awakener Linvala, Shield of Sea Gate Malcator, Purity Overseer Meddling Mage Midnight Pathlighter Mistmeadow Vanisher Mistmeadow Witch New Prahv Guildmage Niko, Light of Hope Portal Manipulator Puresight Merrow Raff Capashen, Ship's Mage Raff, Weatherlight Stalwart Rasputin Dreamweaver Rasputin, the Oneiromancer Reflector Mage Senate Guildmage Sharae of Numbing Depths Somnomancer Stenn, Paranoid Partisan Sygg, River Guide Thistledown Duo Watcher of the Spheres Will, Scion of Peace
This can be costly normally, but this is where Doc Aurlock, Grizzled Genius comes into play