Trade Marner get a 1st + 3rd + +
Offer Sheet Lafreniere 9.1 × 8 yrs
He is going to be a beast especially in the playoffs
As others have said, you need your own picks to offer sheet..BUT...beyond that...
Whoever you trade Marner to, he has to AGREE to go there, AND They need to have the cap space for his contract this year and whatever he wants to sign for beyond that. I know you can make moves and take back contracts to make things fit, but right now who has even $10+m in cap space?
Calgary? Anaheim? San Jose? that is about it. Will he waive to go to any of those places? And would they trade for him confident he would re-sign there with them being so far away from competing and him in the prime of his career right now? I don't think he's going to waive at all until the deadline. And if he does, he is going to hand pick the deal/team he wants to go to.
The reason it will be so hard to trade him is he is likely to WANT to stay in Toronto because this may be the place he has the BEST chance of winning a cup that can fit him under the cap this year.