Elsa, the Fifth Spirit

Lifelink, indestructible
As long as you have the cards Bruni, Nokk, Gale and Earth Giant on the battlefield under your control, Elsa, the Fifth Spirit is a creature.
When this creature is attacking, all attacking elemental spirits have trample.
{t}Tap target creature. This creature then is out under your control, and becomes a 7/7 Earth Giant creature token.