If a spell on the stack has split second while you control Teferi, you can't suspend creature cards since split second stops you from casting them, even though suspending them is a special action
Kitchen Imp Kolaghan Skirmisher Lamentation Liliana, Waker of the Dead Lokhust Heavy Destroyer Manor Skeleton Mardu Shadowspear Mardu Strike Leader Markov Crusader Masterful Ninja Mire's Malice Mirri the Cursed Mogis's Marauder Nether Shadow Nether Traitor Night Clubber Nihilith Olivia's Bloodsworn Ormendahl, Profane Prince Over My Dead Bodies
They contain a mix of board builders (Xyz "Rilliona"), field control (Synchro "Zoroa", Fusion "Zoroa", "Invoked Magistus Omega", "Aiwass"), and recovery ("Ninaruru", Link "Endymion")
3 Likes octaane November 22, 2022, 8:45pm 10 This would be my guess, along with what other people have mentioned (lots of reprints)
When your opponent activates a Spell/Trap Card, while you control a Machine Ritual Monster (Quick Effect): You can detach 1 material from this card