Keymaster Squid is one of the mini-bosses of Thermal Base, alongside Roboshrimp & Shade Trooper, & the mini-boss of Final Dreadnought (Round 2). This enemy is a squid-like robot that carries a keycard required for locked doors.
This enemy attacks by firing shots down in two diagonal directions while continually moving left and right. Each shot has recoil, pushing it with every shot it fires. After taking enough damage, the glass on it will break, dropping the keycard. The Squid will start to move more quickly and will fire more aggressively. From here, the player can either leave it or finish it off to get some extra Crystal Shards.