Check out both of the lists below!
Given the generally low mana-curve in Modern, cards exiled with the pirate monkey will usually be castable with the help of the Treasures and almost any card is worth playing as it simply generates card advantage
Any player who can look at a checklist card in a hidden zone may look at the double-faced card it represents
They keep forward momentum in games, which can break out of a deadlock, but paying 3 mana for that is not a "good" decision
However, the last part of the ability will check how much life you've gained as the ability resolves, so if you've only gained 5 life this turn by the time the end step comes around, you could still gain 2 more life while this ability is on the stack in order to return the target creature card to the battlefield instead of your hand
This is thanks to the sheer volume of draw it provides to mono-green