best double strike cards mtg One Two Punch: Adding a Theme mtg cards that give double

You don't pay mana for the attachment, and the timing restrictions for equip abilities don't apply

Its less effective in Commander but can still certainly shrink some libraries

If a creature is about to die to something unrelated to Vampiric Dragon, then go ahead and spend two mana to put your mark on the creature, and then when it dies, you'll get a +1/+1 counter

There are tons of powerful dragons in Magics history that can warp a Commander game as soon as they hit the table

It opens up a new avenue for deckbuilding, allowing an affinity-style deck to be less of a tap-out style deck and shift it towards being more reactive