Brimstone - Fires a brimstone circle instead of a tech circle.
Azazel: Picking up Brimstone will still override Tech X. When you pick up Tech X as Azazel with his inherited Brimstone, Tech X does nothing at all.
As Azazel, Brimstone no longer overrides Tech X, instead Tech X overrides Azazel's Brimstone. This works quite well with Azazel's good initial damage stat and also negates his initial range penalty.
Overrides Tainted Azazel's Brimstone.
Technology: The damage boost from Brimstone+Technology is lost, but the laser fires while charging the brimstone ring.
Dr. Fetus - Overrides the charging effect, but shoots a laser ring with a bomb in the middle.
Epic Fetus - Each missile shoots 10 laser beams like from
Technology in each direction, similar to Tammy's Head.
Haemolacria - Haemolacria tears will burst into 3-5 Tech X rings on impact.
Mucormycosis - Hitting enemies has a chance to stick a spore to them.
Mom's Knife - Simultaneously fires the knife and laser ring(s).
Overrides Tech X.
Monstro's Lung - Extra laser rings with different sizes depending on how long Isaac charges it are fired, will increase charge time.
Rubber Cement - The rings bounce off walls and have infinite range
Spoon Bender - While the rings won't home in on enemies, they will bend inwards to hit enemies within each ring, resulting in a substantial damage area increase.
Strange Attractor - Magnetic effect pulls pickups and objects to the edge of the ring, increasing accuracy.