Wherein your humble scribe presents, for no reason in particular, a new monster for Swords & Wizardry (Core Rules), the Vampire Toad.
Vampire Toads are large (5′ long), ebon-hued amphibians who have been infected with an arcane affliction akin to “normal” vampirism. The bite of these creatures drains a level from the victim if a save is not made. Each level so drained adds 1 hit die to the Vampire Toad (to a maximum of 8 total HD), increasing its hit points as well as its ferocity in combat.
Though they are not truly Undead, Vampire Toads may be turned as though they were by anyone wielding a silver mirror.
Vampire Toad: HD 4; AC 5; Atk 1 bite (1d6 + level drain); Move 6; Save 13; CL/XP 9/1100; Special: +1 or better magic weapon to hit, 35% magic resistance, level drain (save applies).