Summons a Midnight Portal to fight for you Summoning additional will instead conjure more rune to orbit the portal, further strengthening it's power. Portal will close if attempting to summon more runes than your max minion count. 'Red Magic is the darkest magic'
The Rod of Echthros is a Pre-HardmodeSummon weapon that summons a Midnight Portal surrounded by three shadow runes which fires shadow beams at enemies. Attempting to summon multiple portals will instead add more runes to the existing one allowing it to shoot faster, the portal will disappear if the player attempts to summon more runes than their max minion slots.