Sure, you cant flicker it, but youll likely only need one shot to wipe everyone out anyway, so who cares
The events at a library usually require an RSVP, but like all those libraries for book borrowing, be prepared to share Magic cards and welcome newcomers
Heck, if you can be sure your cards can't be targeted (with something like Archetype of EnduranceArchetype of Endurance, perhaps), you can use Zuran OrbZuran Orb and a sacrifice outlet to sacrifice your lands and Lumra, Bellow of the WoodsLumra, Bellow of the Woods only to bring the big Bear back to play with it's built-in Splendid ReclamationSplendid Reclamation
Storing your Pokmon cards in a safe or safety deposit box can provide extra security
One thing to keep in mind though, if you play this on your opponents turn, it will mean that your Dragon Turtle untapped before their creature does, since your next turn will be more immediate, and that means that Dragon Turtle will get to take advantage of the thing being tapped down for one attack
And it burns