Quote from WeaponXSolitary confinement or leyline of sanctity seem the best options if he wins with a targeted spell.
Quote from LitewariorNevermore naming Show and Tell could potentially work as long as it doesn't get countered. Thalia, Guardian of Thraben and Thorn of Amethyst can slow him down.
Really S&T is a bad match up for aggro decks. Don't be upset that you lose fairly often.
Quote from Wildfire393Thalia, Guardian of Thraben and the threat of Oblivion Ring should be enough to buy you time. Needing 6 mana to be able to cast Show and Tell and then Stifle your O Ring is waaay slower than the 4 mana he needs to do it without Thalia.
Ethersworn Canonist also helps a bunch, stopping him from being able to play anything after a resolved show and tell.
Quote from rukcusO-ring and D-sphere are both good choices against Show & Tell strategies in general. Angel of Despair is also a good aggressive option too. Note that all of these lose to Stifle, but the likelihood that the S&T player has all three -- S&T, Omniscience, Stifle + a way to win after all that exchange, is generally low.
Quote from HelixAgainst show and tell specifically people have been using venser, shaper savant and or angel of despair. They both have some come into play effects that can deal with anything that gets put into play off of show and tell. There are more like humility but it does not deal with the omniscience aspect of the deck.
Quote from PorkAbolish seems really good.
Quote from benbuzz790Ancient Tomb, Black Lotus, Vraska the Unseen
Quote from CatPartyAfter reading this thread I threw together a quick Hex/Depths deck on cockatrice last night. I splashed in green with some bayous to allot for Into the North, because as far as I can tell, cycling cards aside, thats the most efficient card that lets me fish for Depths. I also included a set of Fog and a set of Lotus Petals. I only managed to get Marit Lage out on turn 3, and I was up against a Blighted Agent deck (which is everywhere these days) and lost before I could swing. This happened 3 games in a row, in the exact same way.