paper surge
We have one for sword
For shield you could do the shield bash idea from pea_sh0ter
For helmet maybe something that increases your view range (passive)
For armor something that lets you take a hit during bosses
For boots we have boost/wind dash
For ring maybe something that creates a lot of gems in front of you
For dagger an alternative to sword that attacks faster but is weaker
For axe we have rage mode?
For staff something that makes a damaging orb at your click location
For bow we have bow
For spellbook we could get something that shoots a laser from the sky with a long cooldown
For spirit something that spawns some enemies infront of you with a low chance to spawn in giants
For necklace something that gives you a jump boost(like boost but vertical)
For gloves something that kills all enemies on screen with a cooldown
For cape something that makes you sparkle and all enemies move towards you
For claw another alternate for sword with lower speed but more damage
And for spear yet another alternate of sword that has lower damage but more range
This took me awhile to write, be free to give any constructive feedback
iron scarab
tribal rock
opal salmon