This is a mistake — Cast into the Fire only has 3 copies in sideboard. Adjusting: Caw Gates relies on small creatures like Sacred Cat (1/1) and Outlaw Medic (1/3) plus token generation from Malevolent Rumble, making Breath Weapon's 2 damage sweep very effective against most of their board while missing only the tougher Guardian of the Guildpact and Outlaw Medic. Cast into the Fire cleanly answers Sacred Cat and Eldrazi Spawn tokens, or exiles Melded Moxite before it can generate a Robot token. Cut slow, non-interactive cards like Highway Robbery and Kitchen Imp in favor of proactive removal, since this matchup rewards clearing their board before Journey to Nowhere and Prismatic Strands stabilize the ground.