"Sevenstar"

"Sevenstar" is an archetype that seems to focus on generating advantage and/or tempo. The primary main deck monsters can all be special summoned from the hand, with the caveat that they afterward restrict the ability to special summon without using card effects that turn (preventing the special summon of duplicates if not also the other members).

The extra deck monsters, on the other hand, can all be normal summoned (!) from the extra deck, without an actual card cost (!!).

Each continuous spell card and pendulum monster in the series reward Normal Summons, while each individual such support card also rewards a different kind of supported summon (Link, Ritual, Fusion, Synchro, XYZ, Pendulum, or Token).

Boyish Ally - Sevenstar Seeker

Proud Fighter - Sevenstar Prince

DARK/Level 5/Beast-Warrior/Effect

This card on the field is unaffected by "Sevenstar" cards/effects that both activate and resolve while it is on the field, also this effect cannot be lost, changed, or negated.

Guardian Ally - Sevenstar Divinity

LIGHT/Level 2/Pendulum 2/Spellcaster/Pendulum/Effect/200/200

(P) When a "Sevenstar" monster(s) is Normal or Pendulum Summoned, you can activate this effect: one of those monsters gains ATK equal to its 300 X its level, also afterwards its ATK is not affected by specified numerical increases or decreases from activated effects, except the 1 largest affecting it (your choice, if tied). When a "Sevenstar" monster is Special Summoned from the graveyard: you can activate this effect; Until the end of the turn, its original attack becomes 5 X the original value, but players take no damage.

Effect--S

Warrior Ally - Sevenstar Gukkon

EARTH/Up & Down Arrows/Beast-Warrior/Link/Effect/1800/Link-2

2 Monsters (2 Tokens OR 2 Non-tokens)

You can Normal Summon this card (from the Extra Deck) to an appropriate Extra/Main Monster zone by revealing 2 "Sevenstar" Spells or Pendulum Monsters in your hand or among face up or face down cards you control. Once per damage calculation: you can reveal 1 "Sevenstar" Monster in your hand or among face up or face down cards you control, except monsters previously revealed for this card's effect or "Earth Ally - Sevenstar Gukkon", and if you do, this monster gains ATK equal to that card's original ATK. During the end phase the turn this effect was activated: this attack gained becomes 0, unless you destroy 1 "Sevenstar" Spell card in your hand or among cards you control (face down or face up).