When you buy a copy, Wizards says half of it will go to Extra Life, which supports Children's Miracle Network Hospitals, providing millions of treatments to kids at 170 member hospitals in the US and Canada
So, having a healthy number of spells that grant your creatures haste is a good idea in a deck reliant on creatures to win the game
You can keep the old images by moving them into a separate folder somewhere, or just overwrite the images, its up to you
In particularly, Im hoping to pull off some craziness like casting Triumph when I have a Hydra Omnivore and Finest Hour in play and an opponent who has no blockers Time Stop can be incredibly mean, but sometimes its also the only card that can potentially keep a player from combo killing a table
The copy is created on the stack, so it's not "cast." Creating the copy won't cause abilities that trigger when a player casts a spell to trigger
Mox Opal And of course we have Mox Opal as not just the best colorless metalcraft card, but the best metalcraft card in general