Test Case 4 idea i had, tell me if it sounds op or useless

Recover Mana (Drain) / Applies an 8 second buff to Asuka, makes all normals recover mana by themselves, recovery amount is proportional to attack damage and therefore scales with combos (2x cards)

Bookmark Related Import / Discards all bookmarked spells and bookmarks new spells of the same category in every slot, blank spells get bookmarked randomly (2x cards)

Spatial Distortion Wand (Duplicate) / Summons a staff that creates a gate. Any cube projectiles (except super) that passes throught the gate is duplicated, cubes suffer a slight size reduction. Staff can be placed anywhere (1x card)

Spatial Distortion Wand (Attraction) / Summons a staff that creates a gate. Any cube projectiles (except super) that passes through the gate homes directly to the opponent as well as becoming slightly faster, does not apply GC (1x card)

TC4 would have:
2x Howling Metron
4x Delayed Howling Metron
4x Howling Metron MS Processing
3x Bit Shift Metron
3x RMS Boost Metron
2x Metron Arpeggio
3x Delayed Tardus Metron

Replace-To-Marker / Switches Asuka's and the opponents position. Is faster than Go-To-Marker but has a higher mana cost (2x cards)

Molecular Reinforcement λ / Applies a buff to Asuka. The next spell used cannot be destroyed by attacks. Has a high mana cost and takes away some of Asuka's health when used (1x card)