mtg invocation cards Masterpiece Doomsday #42 [Amonkhet Invocation] damage that would reduce your life total to less than 1 reduces it to 1 instead. Daze (Invocation) [Amonkhet Invocations]

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(2019-07-12) If Bag of Holding is moved to exile when you sacrifice it (most likely due to Leyline of the Void's effect), it remains in exile

That makes it a quiet, but effective backbone for generating extra mana each turn across all kinds of decks

If Lurrus of the Dream-Den is your companion, you can potentially use the Sleeper Dart as a card draw engine, while also locking a creature down indefinitely

Having such consistent access to a powerful effect makes this an excellent Simic token commander that gives your deck far more consistency than you could hope for with it in the 99