Something like a self destruct, or a deadlier version of ramming speed from the decimator.
Make it take up an illicit upgrade, and have the card read "if this ship has received any critical hits, and is touching another ship, it may destroy itself to inflict 2 damage on every ship it is touching" or let it work for an area of effect, at one range and one damage that must be rolled.
Thoughts? It's pretty situational, but it's not very different from a doomshuttle