Forum:Black horn of heaven--what is destroyed?

A player declares he's about to Synchro Summon a monster (having all the necessary monsters on his side of the field), but his opponent stops him with a Black Horn of Heaven. The trap specifies that if the Summon is successfully negated, something is destroyed. My question is, what ends up destroyed? The Synchro materials? The Synchro monster? Both? Obtusepyramid (talk • contribs) 01:15, July 19, 2015 (UTC)