On the other hand, if an ability targets two or more creatures, it will resolve if at least one legal (valid) target still exists
The four most powerful cards in Pioneer are Fable of the Mirror Breaker, Treasure Cruise, Unholy Annex, and Arid Archway
For example, you can get rid of the drawback trigger

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While they don't appear to have any specific mechanics tied to them, the cards can likely be included in any deck that's made of one of the card's two ink colors