This is one of the spirits that has 3 families
Thanks to this card's destroy effect, which lets it revive from battle, you can attack as much as you want, until your opponent blocks with their life, or use something that has less BP to block, either way, you take advantage. If you feel defenseless, put cards that protects yourself
Rean has a special effect that it can be braved with any spirits ignoring the brave condition, but badly this doesn't give extra families from the brave. Fortunately, its level 3 braved effect steals all other families you control
This card has a best pair, it's called "The Drifting Zero Gravity Island", this nexus' effect gives Rean holy life, as well as drawing a card from your deck, whenever your Hunter Beast spirit exhausts, at the meantime, when Rean is defeated, you can exhaust a Hunter Beast spirit (to draw 1 more card, since it was exhaust), and summon Rean again at no cost. Repeat this combo, then you'll have many cards in your hands
Strengths/Pros:
It can be revived after it's destroyed
Weaknesses/Cons:
This card can't be revived if it is destroyed by a lack of cores
I give this card 8/10