Door slam: opening doors on enemies does door damage, which is slightly boosted by melee equipment and buffs, and majorly boosted by door equipment and buffs; Open energy: dealing door damage buffs the next energy attack you do; Empowerment - cat door: landing a critical hit with door damage will buff summon damage; Door slam Plus: damage from door slam gets increased damage if the door used requires materials that aren't available early game; Door slam Pro: every boss defeated will increase the damage of door slam. Stacks with door slam Plus. Mini door bullet recipe: allows you to craft mini door bullets which has half of it's damage deal door damage rather than ranged damage. Door spear improvement: increases door damage of door spears. (Duh); Door to the shadow realm: door damage deals more damage to enemies that are damaged. Enemies that die to door damage will emit darkness, but this effect is mostly cosmetic. Doorbell: bells will not only summon ear crippling soundwaves, but they will cause doors to fall on the enemy. Late-game enemies are not damaged by this as much, for balancing purposes. Empowerment - vault door: enemies killed by door damage drop extra coins. Becomes purple if you have door to the shadow realm, but barely affects the value of the coin. Telepathy slam: door slam will hit enemies regardless of what direction the door was opened. Door crusher: door slam now works on trapdoors. Door tank: slowly opening the door and managing to hit an enemy with door slam will do extra damage. Hard to land, but devasting hit. Door lineup: putting lots of doors in a line and knocking them like dominoes will slightly increase damage for each door knocked over; Door double: doubles door damage. Stacks with other multipliers. Recall door: create a door that teleports you to your spawn. Disappears after usage.