Forum:Can Injection Fairy Lily's effect be affected by 'Secret Pass To The Treasures'?

Secret Pass To The Treasure allows a monster with 100 ATK or less to attack directly the turn it is activated. My question is, if you used this card on Injection Fairy Lily, and then used its effect during the Battle Step, could you still attack directly, or no? And is so, could it still work if you stacked Megamorph with it?