Getting multiple uses out of a Bojuka Bog, or just getting more Field of the Dead triggers, is very powerful stuff
Maybe if it destroyed seven creatures per swing I could see it, but for now, this is a flavor win and nothing more
If that permanent loses its abilities and then would go to a graveyard, it will still be exiled instead
You can check out more details in our guide to Storyborn, Dreamborn and Floodborn characters in Lorcana
At a cost of seven Ink, it isnt cheap to play, but if you have a character that costs seven or more on the field, you can tap it to play Be Prepared without paying its Ink cost
In the incredibly rare case where there is no legal target for the last mode, that mode can't be chosen