Relentless Endurance. When reduced to 0 hit points, <$title_short_name$> drops to 1 hit point instead (but can't do this again until they finish a long rest).

Spellcasting. Krell is a 4th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 12, +4 to hit with spell attacks). It has the following druid spells prepared:

Cantrips (at will): druidcraft, produce flame, shillelagh

1st level (4 slots): entangle, longstrider, speak with animals, thunderwave

2nd level (3 slots): flaming sphere, barkskin

Quarterstaff. Melee Weapon Attack: +6 to hit (+4 to hit with shillelagh), reach 5 ft., one target. Hit:7 (1d6 + 4) bludgeoning damage, 8 (1d8 + 4) bludgeoning damage if wielded with two hands, or 6 (1d8 + 2) bludgeoning damage with shillelagh.