It is rarely finished
If youre not punished for doing it, then why not join in

Other printings of Dark Withering $0.65 Dark Withering Dominaria Remastered $0.23 Dark Withering Dominaria Remastered $0.77 Dark Withering Time Spiral Remastered $1.20 Dark Withering Time Spiral $0.12 Dark Withering Commander 2019 Most valuable cards in The List View the full price guide $109.34 Ancient Tomb The List $67.21 Vampiric Tutor The List $65.47 Shadowspear The List $63.32 Anointed Procession The List $59.31 Rhystic Study The List $58.11 Minamo, School at Water's Edge The List $57.28 Nykthos, Shrine to Nyx The List $55.15 Demonic Tutor The List More cards by Wayne Reynolds $133.19 Liliana, Heretical Healer // Liliana, Defiant Necromancer San Diego Comic-Con 2015 $126.89 Doubling Season Ravnica: City of Guilds $109.99 Dreadbore Ravnica Remastered $103.84 Silence Time Spiral Remastered $84.86 Chandra, Fire of Kaladesh // Chandra, Roaring Flame San Diego Comic-Con 2015 $83.76 Jace, Vryn's Prodigy // Jace, Telepath Unbound San Diego Comic-Con 2015 $72.04 Blightsteel Colossus Double Masters $61.69 Ashling, the Extinguisher Eventide SetThe List Most valuableTop 100 Magic: The Gathering cards You might also like...

Your opponents always have the option to discard, thus you should expect them to make that choice most of the time, as the idea of whatever construct, robot, or vehicle coming down for free will scare your opponent
WotC correctly determined that annihilator is about as fun as a stubbed toe, so Ulamog 2.0 dropped the mechanic altogether in favor of exiling 20 cards on attacks