Rose is a hero you get if you plan on playing lich and using mass spiders. If not do not buy rose. She costs three energy to deploy which is very expensive and she will fall behind in experience and levels because of this.

Spider Queen
Rose spends 3 Energy when she enters the battle. She enters the battle accompanied by 10 Spiderlings.

Mother of Spiders
Rose calls her children to join the battle. X spiders will periodically be summoned on the battlefield.
Free units? Yes please.

Spider Web (costs 3 mana)
Rose casts a spider web on the battlefield. All allied spiders get a X% attack speed and movement speed bonus while in the area. All enemies there will get a X% attack speed and movement speed penalty.
This spell is good probably want to max it.

Venom Explosion
Spiderlings summoned by Rose will explode upon death, dealing total X of poison damage to enemies around them. Undead, Mech and Building units do not receive poison damage.
You won’t have enough ability points to get this.

Spiders Expertise
When Rose is on the battlefield, all friendly spiders get X% damage and HP bonus.
This stacks with Spider Web.

Toxic Touch
Rose poisons her enemies with her normal attacks, dealing an additional stacked X poison damage and reducing enemies’ attack speed and movement by X%. Undead, Mech and Building units do not receive poison damage.
Crowd control great passive get at least one point.

Speed Hatching
Rose summons more Spiderlings at the beginning of the battle. Number of spiders summoned when entering the battle increased by X.
Worth getting a point or two.

Building Rose
(no enough data)

Equipping Rose
(not enough data)