Planeswalker abilities at instant speed

[Prplprince]

If I have the new planeswalker's emblem that allows me to use planeswalkers abilities as though they had flash does that mean I can activate them once during each turn. As in if I'm playing a 4 man free for all does that mean I. An activate my  {Liliana Vess} discard 4 times before my next turn or that I can activate it once before my next turn but at any time

[Remillo]

Yup.  You can activate them once per turn, any time you could cast an instant.

[Prplprince]

My 5 color superfriends edh deck is pleased

[sithantic]

Tefari's emblem states "You may use a planeswalker's ability on any player's turn any time you could cast an instant." Isn't the wording of this card meant to fully override that current ruling of when you can use walker abilities? I mean, you can cast an instant in response to many things: upkeep, entering combat, declaring attackers, declaring blockers, not declaring blockers, end step, anytime a player does anything. I honestly don't think you're limited to just once per turn with this emblem. Since the card is overriding an existing ruling, I'd think if they wanted to keep that part of it, it would say "You may do this only once per turn." since we have precedence for that wording.

[Stolen711]

606.3: A player may activate a loyalty ability of a permanent he or she controls any time he or she has priority and the stack is empty during a main phase of his or her turn, but only if no player has previously activated a loyalty ability of that permanent that turn.

The "only if no player has previously activated a loyalty ability of that permanent this turn" is still in effect even if you can activate them at instant speed. The only way to override this is with the {the chain veil}.

[Spikepit]

Tefari's emblem states "You may use a planeswalker's ability on any player's turn any time you could cast an instant." Isn't the wording of this card meant to fully override that current ruling of when you can use walker abilities? I mean, you can cast an instant in response to many things: upkeep, entering combat, declaring attackers, declaring blockers, not declaring blockers, end step, anytime a player does anything. I honestly don't think you're limited to just once per turn with this emblem. Since the card is overriding an existing ruling, I'd think if they wanted to keep that part of it, it would say "You may do this only once per turn." since we have precedence for that wording.

The wording you need to take not of is
"You may use a planeswalker's ability on any player's turn any time you could cast an instant" and not worded as
"You may use planeswalker abilities on any player's turn any time you could cast an instant."

[Demigoron]

Tefari's emblem states "You may use a planeswalker's ability on any player's turn any time you could cast an instant." Isn't the wording of this card meant to fully override that current ruling of when you can use walker abilities? I mean, you can cast an instant in response to many things: upkeep, entering combat, declaring attackers, declaring blockers, not declaring blockers, end step, anytime a player does anything. I honestly don't think you're limited to just once per turn with this emblem. Since the card is overriding an existing ruling, I'd think if they wanted to keep that part of it, it would say "You may do this only once per turn." since we have precedence for that wording.

If that were true, you could activate a planeswalker's ability in response to activating its abilities.  That would result in activating any plansewalker an infinite amount of times per turn.  WotC would not give us a card that powerful, ever.  Now, I wouldn't mind this being true, but it turns Tefari into an instant win-con: drop tefari, ultimate him, activate every plansewalker you control until you kill the opponent using some combination of abilities.  WotC would never give us a card so oviously broken.

[Micah12mm]

Tefari's emblem states "You may use a planeswalker's ability on any player's turn any time you could cast an instant." Isn't the wording of this card meant to fully override that current ruling of when you can use walker abilities? I mean, you can cast an instant in response to many things: upkeep, entering combat, declaring attackers, declaring blockers, not declaring blockers, end step, anytime a player does anything. I honestly don't think you're limited to just once per turn with this emblem. Since the card is overriding an existing ruling, I'd think if they wanted to keep that part of it, it would say "You may do this only once per turn." since we have precedence for that wording.

If that were true, you could activate a planeswalker's ability in response to activating its abilities.  That would result in activating any plansewalker an infinite amount of times per turn.  WotC would not give us a card that powerful, ever.  Now, I wouldn't mind this being true, but it turns Tefari into an instant win-con: drop tefari, ultimate him, activate every plansewalker you control until you kill the opponent using some combination of abilities.  WotC would never give us a card so oviously broken.

Well according to the rules you can only play a planeswalker ability once per turn so you wouldn't be activating it infinite times