The Guild

At the beginning of your upkeep put a bounty
counter on a creature an apponet controls and a
quest counter on a creature you control.
When a spell destroys a creature with a bounty
counter on them, that spell's controller adds {3} to their mana pool.
You may tap a creature you control with a quest counter on it and remove a quest counter from it
to make it fight a creature an opponet controls or
add {1} to your mana pool.