Giant Spider

Lv.1

Parasites all enemies, when a parasitized enemy is killed, hatches 3 small spiders

Mind of the Swarm

Small spiders restore 1% of the Spider King's max HP when attacking

Lv.2

Every 2s, hatches 1 small spider on field, inheriting 20% ATK, 100% defense, 5% HP from Giant Spider

Building this character

Read from their own skill text, quoted below. Not a meta ranking.

What the kit leans on

1. 1HP

   Mind of the Swarm — Small spiders restore 1% of the Spider King's max HP when attacking

2. 2ATK

   Lv.2 Every 2s, hatches 1 small spider on field, inheriting 20% ATK, 100% defense, 5% HP from Giant Spider