Concentrated Explosion

Concentrated Explosion is a spell that drastically lowers the radius of an explosive projectile while increasing its damage.

Tips

The -30 explosion radius can only counteract added explosion radius from spells like Explosive Projectile. It can not reduce the base explosion radius of whatever it modifies.
Concentrated Explosion adds a script that sets the explosion radius to 5 on frame 2. If the projectile dies before the script runs, then no radius reduction happens.
Due to this, the explosive will do no damage whatsoever unless it detonates inside an enemy hitbox, which makes this spell limited in practical uses.
When stacking Explosion damage on endgame wands, limiting the explosion radius while increasing damage is very desirable to keep Noita running.
This can be used to turn a Nuke into a large radius Earthquake-like projectile.
Unlike Remove Explosion, it can reduce the explosiveness of Explosive Boxes, Unstable Crystals, Propane Tanks, Lightning Bolts, or Thunder Charges, making them relatively safer to cast.