Rules:

Infinite Mana
You must play spells at the first moment you can cast them.
If your spell has a target, you must cast it.
You can only play/activate cards once per turn cycle. You must then play/activate it at the exact moment next turn cycle if possible.
X is always 5.

Each player's life total resets to 20 at the beginning of each turn
Each player starts with three cards in hand.
All players play open handed.
All players share a graveyard.

If you can/may do something, you have too!