They are both drawn to the powerstone sealing it, and they grab it at the same time, causing it to break into two parts
Green heavily rewards you for playing big creatures, often in card advantage through cards like Garruk's Packleader and Vaultborn Tyrant
Umbra armor's effect is mandatory
More often than not, getting your cards graded by an authority such as PSA will increase their value, but if this is your sole reason for submitting do take into account the grading costs, and the extra fees you might pay to a market place to sell the higher value version of your card
Whether youre looking to bling out your blue Commander decks, or make a statement with UW Control in Modern, you can now awe and frustrate opponents in equal measure
In 2011, Wizards added the clause that they would never print any of the cards on the list in MTGs premium or non-premium products