CB TTar can OHKO Sigilyph even after the burn: Tyranitar@Choice Band (252 EVs, +Nature) Stone Edge vs Shinboraa (252/0 EVs, Neutral Nature): 95,4 ~ 112,6% (332 ~ 392 HP). The problem for the TTar user is that Sigilyph can easily set up a cosmic power on the turn TTar comes in, burn before it attacks and stall it out with roost. Actually, the Sigilyph user can aslo predict the switch in, burn TTar on the turn it comes in and then proceed to stall it out of SE pp with roost. Either way TTar is gonna lose unless Sigiliph has already taken some prior damage or TTar is the curse\rest variant.