Forgotten Ancient works best in decks that either cast a ton of spells, have +1/+1 counter strategies, or otherwise benefit from having massive stats
And good luck, if you decide to open some packs
It's best if you're able to equip Glenn with an Umezawa's Jitte that has counters on it since you can attack with the low skulk power and then after blockers are declared and Glenn is unblocked, you simply use the counters to beef him up and reap the rewards
It attacks for a lot of damage if left unchecked
If so, then I am slightly disappointed (just joking :), I don't think I could be disappointed, you write so well ) you didn't mention the quirky Global and Local enchantments - at least I believe they were named such back in the day, but I am looking at you for confirmation
(To mill three cards, put the top three cards of your library into your graveyard.) The land card you return to your hand can be one you just milled or it can be one that was already in your graveyard