You have a historic permanent card in hand that can be cast using ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
({1} magic symbol) if the permanent requires five or more mana to cast available.
Steps
Activate Mana Crypt by tapping it, adding ({C} magic symbol) ({C} magic symbol) .
If the historic permanent can be cast for less than ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) , this combo nets infinite mana.