Village:
All "Ice Barrier" monsters you control gain 300 ATK. Once per turn, when an "Ice Barrier" monster is sent/discarded directly from your hand to the graveyard, you can draw one card. Once per turn, you can activate one of the following effects:
● Send one "Ice Barrier" monster from your deck to the the graveyard.
● Send one "Ice Barrier" monster from your hand to the graveyard.

Attack- ATK cause that's how konami words it when you refer to stats, not the action.

Avatar of the Ice Barrier
WATER level 5 Spellcaster Effect
800/800
You can special summon this card from your hand by sending 1 other "Ice Barrier" monster in your hand to the graveyard. If special summoned this way, you can choose to gain the name and effect of the "Ice Barrier" monster that was sent to the graveyard to special summon this card until the end phase of your opponents turn. Once per turn, during either players turn (except during the battle phase) you can send one "Ice Barrier" monster from your deck to the graveyard to gain its name, effect, and half of its ATK and DEF until the end phase of your opponents turn. You can only gain the effect of 1 "Ice Barrier" monster per turn. If 2 or more "Ice Barrier" monsters would be destroyed by a card effect, you can tribute this card; "Ice Barrier" monsters remaining on the field are unaffected by that card.

No need to specify "you don't gain atk/def". And there's also no need to put in (this is a quick effect); that's probably very old wording for some old cards. Nowadays if you see "(once per turn) during your/either player's turn", that's how you'd know it's a quick effect.

Dai Wu, Deity of the Ice Barrier
WATER level 5 Warrior Effect
1900/1200
You can special summon this card from your hand or graveyard by returning 1 "Ice Barrier" monster you control, except "Dai wu, Deity of the ice barrier", back to your hand. This effect cannot be used if an "Ice Barrier" monster was special summoned this turn, except during the end phase of your turn. This card gains 200 ATK and DEF for every "Ice Barrier" monster you control. While this card is face up on the field, "Ice Barrier" monsters you control and in your graveyard cannot be removed from play by your opponent's card effects. Once per turn, you can tribute 1 "Ice Barrier" monster you control to destroy 1 card on the field. When this card is destroyed by a card effect, remove it from play; you can then return 1 of your removed from play "Ice Barrier" monsters, except "Dai Wu, Deity of the Ice Barrier", back to your graveyard. You can only control 1 "Dai Wu, Deity of the Ice Barrier.

Lunaris, Guardian Spirit of the Ice Barrier
WATER level 1 Aqua Tuner/Effect
300/200
Once per turn, you can send this card from your hand to the graveyard to add 1 "Ice Barrier" spell card from your deck to your hand. During your turn, except the turn this card was sent to the graveyard by its own effect: you can banish this card from your graveyard; add 1 "Ice Barrier" monster from your graveyard back to your hand. While this card is face-up on the field, "Ice Barrier" monsters you control gain 200 ATK and lose 200 DEF.

Lu Mai, Legendary Warrior of the Ice Barrier
WATER Level 7(or 8)Warrior Fusion/Effect
2500/2200
2 "Ice Barrier" monsters
This card can be special summoned from your extra deck by shuffling the above cards you control into your deck. (You do not use Polymerization.) While this card is face-up on the field, "Ice Barrier" monster's effects on your side of the field and in your graveyard cannot be negated by your opponent's card effects, nor can control of face-up "Ice Barrier" monsters on your side of the field switch to your opponent. Once per turn if this card would be destroyed by battle or by a card effect, it is not destroyed. You can only control 1 Lu Mai, Legendary Warrior of the Ice Barrier.

Do you want it to be like the glad beasts? Or is it ok to fusion summon it with poly and whatnot? It just says it can be special summoned that way, not "can ONLY be special summoned by shuffling..."

Miyoki, Guard Wolf of the Ice Barrier
WATER level 3 Beast Effect
1300/900
When an "Ice Barrier" monster is normal or special summoned to your side of the field, you can special summon this card from your hand. While this card is face-up on the field "Ice Barrier" monsters you control cannot be flipped face-down. When this card is destroyed by your opponent's card effect, during your next standby phase, you can add this card from your graveyard to your hand. When this card is special summoned from the graveyard by the effect of an "Ice Barrier" monster you control, you can draw one card.

Spirit Gate of the Ice Barrier
Normal Spell Card
Shuffle 3 "Ice Barrier" monsters in your graveyard into your deck and draw 2 cards.

You want that as the full effect? Or shuffle 3 as the cost and draw 2 as the effect? I'd prefer cost and effect, though idk if dark bribe/magic jammer/anything else that can negate spells would negate it altogether or if you'd still shuffle for the cost but not draw.