Porphyry Nodes | Magic: The Gathering
Formats Porphyry Nodes is Legal in
Official Oracle Text for Porphyry Nodes
When there are no creatures on the battlefield, sacrifice Porphyry Nodes.
Official Rulings for Porphyry Nodes
2/1/2007 : This is the timeshifted version of Drop of Honey.
7/1/2013 : If the creature with the least power has indestructible, the ability does nothing.
7/1/2013 : If there are multiple creatures tied for least power and some but not all of them have indestructible, the ones with indestructible can't be chosen.