Black Slime

	Classic	Expert	Master	Legendary (For the Worthy)
Life	45	90	135	180
Attack	15	30	45	80
Defense	4	4	4	4
Knockback Taken	100% (High)	81% (High)	64% (Med)	64% (Med)
Coins	20	50	50	70

The last column is Master mode in a For the Worthy world.

Numbers are for one player, before Hardmode.

Coins: each kill rolls from 80% to 175% of this value. Rarer extra rolls can add more.

In a Hardmode world

In Expert and Master, Hardmode scales up weak enemies: those whose attack plus defense plus a quarter of life is under 80 (100 after Plantera).

World	Life	Attack	Defense	Knockback Taken	Coins
Expert, In Hardmode	198	54	8	81% (High)	80
Master, In Hardmode	297	81	8	64% (Med)	80
Legendary, In Hardmode	396	144	8	64% (Med)	112
Expert, After Plantera	296	80	12	81% (High)	120
Master, After Plantera	444	120	12	64% (Med)	120
Legendary, After Plantera	592	213	12	64% (Med)	168

Classic

Item	Quantity	Chance	Kills for 50%	Kills for 90%	Conditions
Gel	4 to 10	100%			In a world made with the Celebration Mk 10 and Drunk seeds, but not the Remix or Not the Bees seed
Gel	2 to 5	100%			In every world not made with the Celebration Mk 10 and Drunk seeds together
Slime Staff	1	1/10,000 (0.01%)	6,932	23,025

Expert

Item	Quantity	Chance	Kills for 50%	Kills for 90%	Conditions
Gel	4 to 10	100%			In a world made with the Celebration Mk 10 and Drunk seeds, but not the Remix or Not the Bees seed
Gel	2 to 5	100%			In every world not made with the Celebration Mk 10 and Drunk seeds together
Slime Staff	1	1/7,000 (0.014%)	4,852	16,117

Master

Item	Quantity	Chance	Kills for 50%	Kills for 90%	Conditions
Gel	4 to 10	100%			In a world made with the Celebration Mk 10 and Drunk seeds, but not the Remix or Not the Bees seed
Gel	2 to 5	100%			In every world not made with the Celebration Mk 10 and Drunk seeds together
Slime Staff	1	1/7,000 (0.014%)	4,852	16,117

Chance is per kill. Kills for 50% / 90% is how many kills give that chance of at least one drop.