18 Feb 2022
The creature or planeswalker card you return to your hand is not chosen until after you mill three cards. You may choose a creature or planeswalker card from among all the cards in your graveyard, including the milled cards.
18 Feb 2022
Discarding the card is part of the cost to activate a channel ability.
18 Feb 2022
If a channel ability requires a target, you may not activate it without a target just to discard the card.