Yveltal (BKT 94). Float Stone (BKT 137). I cannot attach float stone with Yveltal active. Yveltal only stops tools effects.
------------------Begin Game Log------------------
The game is about to start
Type: QuickPlay
Format: 2016 (XY-STS)
Battle begins between Bidoofiscool and Odysseus!
Coin flip [Opening Flip]: TAILS
Odysseus will start
Game setup complete
Between turns
Turn 1 begins
Odysseus drew 1 card
[Odysseus]: can't attach float stone
[Bidoofiscool]: why not?