Lutri, the Spellchaser

Apr 17, 2020 · The requirements of the companion ability apply only to your starting deck. They do not apply to your sideboard.

Apr 17, 2020 · The controller of a copy can't choose to pay any alternative or additional costs for the copy. However, effects based on any alternative or additional costs that were paid for the original spell are copied as though those same costs were paid for the copy.

Apr 17, 2020 · Lutri's ability can copy any instant or sorcery spell you control, not just one with targets.

Apr 17, 2020 · The copy is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger. It will resolve before the original spell does.

Apr 17, 2020 · The copy will have the same targets as the spell it's copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can't choose a new legal target, then it remains unchanged (even if the current target is illegal).

Apr 17, 2020 · Your companion begins the game outside the game. In tournament play, this means your sideboard. In casual play, it's simply a card you own that's not in your starting deck.

Apr 17, 2020 · If the spell that's copied has an X whose value was determined as it was cast, the copy will have the same value of X.

Apr 17, 2020 · You may have one companion in the Commander variant. Your deck, including your commander, must meet its companion requirement. Your companion is not one of your one hundred cards.

Apr 17, 2020 · If more than one player wishes to reveal a companion, the starting player does so first, and players proceed in turn order. Once a player has chosen not to reveal a companion, that player can't change their mind.

Apr 17, 2020 · If the spell has damage divided as it was cast (like Mythos of Vadrok), the division can't be changed, although the targets receiving that damage still can. The same is true of spells that distribute counters.

Jun 1, 2020 · Paying {3} to put your companion into your hand is a special action. It doesn't use the stack and players can't respond to it. Once you take this action, you may cast that card if it's legal to do so before any other player can take actions.

Jun 1, 2020 · If you reveal a companion outside the game, for as long as it remains there, you may pay {3} any time you could cast a sorcery (that is, you have priority during your main phase and the stack is empty). Once you do, you put it into your hand and behaves like any other card you've brought into the game. For example, if it's discarded, countered, or destroyed, it's put into your graveyard, remaining in the game. This is a change from previous rules.