Seeing as the Pikachu ex card has 120 hp, and is therefore fairly bulky, there is a lot of time for incidental damage to be dealt
Its a bit better than that, and it subtly gives some hate to the decks that revolve around interactions with tokens like Treasure tokens, or even Clue tokens
Change Is Inevitable Rotations are a normal part of almost every trading card game
Make a buddy at the table, cantrip while making at least one Treasure token, then pile up additional Treasures if people start drawing outside their own turns
The War Doctor can be a finely tuned combo deck that can nuke a table if you know what youre doing, and otherwise lets you play with exile as your main theme
The card also has Convoke, meaning your creatures can help pay that cost