Shigeki, Jukai Visionary
Legendary Enchantment Creature — Snake Druid
, 
, Return Shigeki to its owner's hand: Reveal the top four cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest into your graveyard.
Channel — 
, Discard this card: Return X target nonlegendary cards from your graveyard to your hand.
Anna Podedworna
Magic Online Promos (PRM)
• #98023Rulings
Discarding the card is part of the cost to activate a channel ability.
(wotc • 2022-02-18)
If a channel ability requires a target, you may not activate it without a target just to discard the card.
(wotc • 2022-02-18)
Rulings
Discarding the card is part of the cost to activate a channel ability.
(wotc • 2022-02-18)
If a channel ability requires a target, you may not activate it without a target just to discard the card.
(wotc • 2022-02-18)