Kasmina, Enigmatic Mentor
Legendary Planeswalker — Kasmina
Spells your opponents cast that target a creature or planeswalker you control cost 
more to cast.
-2
: Create a 2/2 blue Wizard creature token. Draw a card, then discard a card.
Mid
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• #72253Rulings
You can't do anything in between drawing a card and discarding a card, including casting the card you drew.
(wotc • 2019-05-03)
Spells that target more than one creature and/or planeswalker you control cost only {2} more to cast.
(wotc • 2019-05-03)
To determine the total cost of an opponent's spell that targets a creature or planeswalker you control, start with the mana cost or alternative cost that player is paying, add any cost increases (such as that of Kasmina's effect), then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
(wotc • 2019-05-03)
Related Cards
Rulings
You can't do anything in between drawing a card and discarding a card, including casting the card you drew.
(wotc • 2019-05-03)
Spells that target more than one creature and/or planeswalker you control cost only {2} more to cast.
(wotc • 2019-05-03)
To determine the total cost of an opponent's spell that targets a creature or planeswalker you control, start with the mana cost or alternative cost that player is paying, add any cost increases (such as that of Kasmina's effect), then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
(wotc • 2019-05-03)