For example, an artifact creature card could be put into your hand as the artifact card you choose or as the creature card you choose
If a creature with undying stops being a creature (for example, an artifact creature with undying becomes a noncreature artifact due to Neurok Transmuter 's second ability), undying will still trigger
Hence, such a density may not be as necessary as you would think
In theory, we can double up counters with Maulfist Revolutionary or Quarry Hauler, but that's a lot of work to make Imminent Doom deal two damage instead of one, or four damage instead of two, and we'd still need to cast a spell with the right converted mana cost to trigger it
It cant block, which is a minor downside compared to the long list of benefits it provides
You do not find that in your usual boosters