At many points in Moderns lifespan, and for many decks, this was the ace in the hole against decks like infect or Splinter Twin
The Shift keyword enables players to put out a more powerful version of a character card at a reduced ink cost, if they already have a card in play that matches the requirements
For instance, I predicted Bartz and Boko would be Partner cards, but instead they share a card
Also, theyre an Angel Horror, which is cool
There are some anti-synergiesit contains a high enchantment count and Bane of Progressbut most of the cards are either generally strong or care about counters in some way
One is more than free, but I still think Swords to Plowshares is the best exile effect in the game