Kruthik

They do not have a 5e Kruthik so these are my stat blocks for the little critters.

Kruthik Hatchling Minion
Small natural Beast, LE
AC 15, HP 1, Speed 50 ft, burrow 20 ft, Str 13, Dex 16(+3), Con 13, Int 4, Wis 10, Cha 6
Senses Darkvision 60ft, tremorsense 60 ft, passive perception 10
Hide, Jump
Languages
Challenge 1/4 (50 XP)
Action
Bite: +3, 3 damage and grapple
2 Claws: +3, 4 damage

Kruthik Young
Small natural Beast, LE
AC 15, HP 16, Speed 50 ft, burrow 20 ft, Str 15(+3), Dex 16(+3), Con 13, Int 4, Wis 10, Cha 6
Senses Darkvision 60ft, tremorsense 60 ft, passive perception 10
Hide, Jump
Languages
Challenge 1 (200 XP)
Action
Bite: +5, 1d6+3 damage and grapple
2 Claws: +5, 1d8+3 damage

Kruthik Adult
Medium natural Beast, LE
AC 16, HP 24, Speed 50 ft, burrow 20 ft, Str 17(+4), Dex 18(+4), Con 17, Int 4, Wis 12, Cha 8
Senses Darkvision 60ft, tremorsense 60 ft, passive perception 10
Hide, Jump
Languages
Challenge 2 (450XP)
Action
Bite: +6, 1d6+4 damage and grapple
2 Claws: +6, 1d8+4 damage
Toxic Spikes: recharge 5-6 Posion +6 1d8+4, range 10, Posion 5 ongoing slowed (save ends)