Bloodstained Relics

Hmm...for Bloodstained, some ideas:

Type 1 Relic:

Effects:
Pure Silver Necklace: Wards off dark powers and seals fell magic, decreasing the amount by which Miriam's crystal curse spreads
Steel Wristlets: Gives Miriam the strength to shatter several stained-glass windows throughout the castle, allowing her to access new areas.
Monocle of Scrying: Increases the drop rate for rare alchemy materials.
Obsidian Rosary of Soul Rejuvenation: If Miriam takes fatal damage while fighting a boss, the Rosary activates automatically, refilling her life, boosting her stats, and rendering her invulnerable for 30 seconds. If she does not kill the boss within that time, the effect fades and she dies as normal. However, if she succeeds in defeating the boss, she takes its soul to restore her own. Enemies and traps do not trigger this effect, meaning it won't save Miriam if she dies to regular enemies, spikes, and so on (This is for those tough boss fights where you die when you've almost killed him).

Ability:
Sapphire Gauntlets: Increases Miriam's strength, allowing her to push/pull large blocks.
Graceful Heels: Allows Miriam to backflip by pressing the backdash button twice quickly.

Type 2 Relics: Activated Ability:
Ruby Slippers: Click these three times to return home...(Immediately teleports Miriam back to the last save point/her room)
Shadowcall Incense: Miriam's shadow comes to life, mirroring all of her attacks, movements, and spells.
Pearl Lamp: Activate to light up dark places. Can also reveal hidden chambers and breakable walls.
Beryl Lens: Allows Miriam's little 'horns' to fire a laser in front of her.
Wind Shield: Momentarily creates a barrier of tornado-strong winds around Miriam to blow away projectiles. If timed correctly, these can blow projectiles right back at enemies.
Cloak of Deception: Enemies ignore Miriam while this is activated.

In my experience with Igavanias one of the things I always liked the most about the equipment was the possibility to combine them to get specific setups. Like a lot of defensive items that sacrifice speed to become a defense tank, or a magic tank if you used the shaman shield and shield rod, or go all in and trade all your defense for massive damage but having to be very quick and reflexive to survive, etc. That way the gear compliments your skills the best way possible.

Relics should be simple. You find one and you get its effects. Just like that. No complications needed. Also they can be turn off/on at any moment.

That particular relic sounds like the different level cap modes they used to have. I really liked lv.1 hard mode. That double creature room was annoying as heck though.

The fool's gold relic may be pointless if they do the money drops the way they did in the ds games (all of them I think...) because you never got gold from breakables unless you had full mp. Correct me if I'm wrong as I am posting this on limited sleep.

yeah but but I don't want it to be a full mode for the rest of the game... just when I'm farming for an item.