The Chamber of the Sealed

Prestige- If a crystal entered the battlefield this turn, this card gains"{t}, add {3} mana to your mana pool. Use this mana to only cast crystals."
if over four crystals entered the battlefield this turn, transform this card.
{t}: add {2} to your mana pool. Only use it to cast crystals.
{5}, put two 1/2 crystal tokens on the battlefeild