How to convert OD&D and d20 monster to Metatoy?

How to convert from OD&D and d20 monster to Metatoy?

I use 2 type of tables when doing the monster for Metatoy, the one below:

HD	Average hp roll	Combat/Save	Damage
1	3-4	+1	1d6-1
2	7	+1	1d6
3	10-11	+2	1d6+1
4	14	+2	1d6+2
5	17-18	+3	2d6
6	21	+3	2d6+1
7	25	+4	2d6+2
8	28	+4	3d6
9	32	+5	3d6+1
10	35	+5	3d6+2

*After 10 HD, each additional HD adds +1 to the damage inflicted.

and this AC, AAC to DEF table below:

AC	AAC	DEF
8 to 9	10 to 11	7
6 to 7	12 to 13	8
4 to 5	14 to 15	9
2 to 3	16 to 17	10
0 to 1	18 to 19	11
-1 to -2	20 to 21	12
-3 to -4	22 to 23	13
-5 to -6	24 to 25	14

• Some monster in 3E D&D has HD such as 1d10 or 2d8. To convert this, I usually just get rid of the type of dice and pick the front number. i.e. an HD 2d8 monster in 3E is just HD 2 in Metatoy.
• In 5E D&D, just use monster CR as its HD in Metatoy.

Below are some monster I converted from Monster Manual, some I made up just for the kick. Anyway enjoy your Metatoy monster!

BEAROWL

HD 5+2

DEF 9

Attack:

Claw, Claw, Bite (2d6)

LANDSHARK

HD 9

DEF 8

Attacks:

Tail Swipe (1d6+1) or Bite (2d6) or Deadly Leap (All Close)

Tail Swiping deals damage to 1d3 targets in a Close distance.

Landshark will jump 15ft as part of its movement and land on its feet in a space that contains one or more other creatures. Each creature must make TN 9 Agility or Might save (target's choice) or received 3d6+1 damage. On a successful save, the creature takes only half damage.

 

PERYTON

HD 4

DEF 8

Attack:

Horn (1d6+2)

[Immune to normal weapon] Normal weapon could not harm Peryton.

METATOY

HD 1+2

DEF 12

Attack: Roll 1d6

1-2 Laser Beam (All Close) 2d6 dmg

3-4 Metatoy Sing! (All Short) Target makes Willpower save (TN 9) or all attack roll next round is at Disadvantage.

5-6 Metatoy Panic! Metatoy doesn't attack this turn.