yu gi oh gx spirit caller deck Yu-Gi-Oh! Part 41: New Decks Alexis Rhodes (Spirit Caller) -

So, if you activate your lands to add the mana to your pool, THEN activate the loyalty ability from the planeswalker to untap all the enchanted permanents you control, and some of these enchanted permanents happen to be lands, sure, you can tap them again to add their mana to your pool once more

Is it Legal to Print Out Magic Cards for Personal Use

Legendary Creature - Elemental Sunbird's Invocation Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's mana value

So you target a cultivate and put back a card

I only mention this because Sabrina has a Kadabra that for one Energy allows you to flip a coin, and if heads, put damage on the defending Pokmon until it has 10 HP left

Sure, you only get to venture into the dungeon when you untap the artifact and let its victim go, but still