They could have resolved, not resolved, been countered, or they could even still be on the stack
AI image processing had not been invented yet, and there hadn't been a commercial enterprise to use them either, but that has changed
The fact that Dominaria is crawling with sleeper agents isnt a good excuse to sleep on these awesome new cards
You may want to use this on the lethal attack of a planeswalker you control or on a utility creature like Birds of Paradise that's no longer pertinent
You need a lot of creatures with counters for this to feel worth it, and while this format certainly has decks that can do it, having a baseline of being a blank card is brutal
Emperor of Bones Emperor of Bones is a funky spin on Shallow Grave that invites more interaction from the opponent by being a creature, while also increasing the range of options as the Reanimator player by giving you more early game options that dont involve just shoving on the combo