You are correct - I will place post-hasteShouldn't that be in Homebrews? You're not converting an existing AD&D monster to 5E, which is the nominal purpose of this thread.
You are correct - I will place post-haste
Good point and changed. Anything else as keen to publuish as topical on twitterOnly had time for a quick read through. The blackscale lizardfolk looks fine at first glance, but the lizardfolk sorcerer looks more like a Challenge 4 to me.
I wouldn't give Summon Frogs a Recharge 6 as it means the sorcerer can spam it and amass an army of, on average, 83 giant frogs. (10 minutes = 100 rounds, so with recharge 6 that averages 15 2/3rd summons of 2d4 frogs per summons).
I'd make it a X/day ability, probably only 1/day.
Good point and changed. Anything else as keen to publuish as topical on twitter
I keyed it out on CR caluclator and came out as 3 - but if you feel spells make it stronger then 4 is fine

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.