Endless Mana

: Add . : Return Oboro to its owner's hand.

You may play any number of lands on each of your turns. Whenever you play a land, if it wasn't the first land you played this turn, this enchantment deals 1 damage to you.

If you tap a permanent for mana, it produces twice as much of that mana instead.

This artifact enters with X charge counters on it, where X is your life total. Landfall — Whenever a land you control enters, you may have your life total become the number of charge counters on this artifact.