Seeds of Renewal
Sorcery
Undaunted (This spell costs 
less to cast for each opponent.)
Return up to two target cards from your graveyard to your hand. Exile Seeds of Renewal.
Jesper Ejsing
Commander 2016 (C16)
• #24Rulings
Causing an opponent to lose the game after you've announced that you're casting a spell with undaunted and determined its total cost won't cause you to have to pay more mana.
(wotc • 2016-11-08)
If each target is illegal as Seeds of Renewal resolves, Seeds of Renewal doesn't resolve and is put into its owner's graveyard. It's not exiled.
(wotc • 2016-11-08)
Effects that reduce what you pay to cast a spell don't affect its mana value.
(wotc • 2016-11-08)
If one target becomes illegal before Seeds of Renewal resolves, you'll still return the legal target from your graveyard to your hand.
(wotc • 2016-11-08)
Rulings
Causing an opponent to lose the game after you've announced that you're casting a spell with undaunted and determined its total cost won't cause you to have to pay more mana.
(wotc • 2016-11-08)
If each target is illegal as Seeds of Renewal resolves, Seeds of Renewal doesn't resolve and is put into its owner's graveyard. It's not exiled.
(wotc • 2016-11-08)
Effects that reduce what you pay to cast a spell don't affect its mana value.
(wotc • 2016-11-08)
If one target becomes illegal before Seeds of Renewal resolves, you'll still return the legal target from your graveyard to your hand.
(wotc • 2016-11-08)