She creates aggressive, evasive creatures with her plus ability super easily that then fuel her eventual ultimate ability, which at -6 is a very real possibility if you are able to protect Grist with the deathtouch tokens that she makes
Relying on all your excess mana seems like a bad play, since you'll need to pay six to rebuild the good ship, and the costs only go up from there
If an opponent has been setting up for a powerful turn, but you rip the cards right out of their hand, theyll have nothing to do on their turn, putting them behind several turns
Once your end step begins, it's too late to gain life in order to cause this ability to trigger
A sensible plan is to treat promotional value as a test-drive: try unfamiliar titles, compare session lengths, and log how volatility affects your comfort level