If the legendary spell you cast this way is copied, the copy can be countered.
16-06-2023
wotc
The legendary spell can't be countered if the mana produced by Delighted Halfling is spent to pay any portion of the spell's cost, even an additional cost or an alternative cost. This is true even if you pay an additional cost while casting a spell "without paying its mana cost."
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.