2021-03-19 You are never forced to activate mana abilities to pay costs, so if there is a mandatory additional mana cost (such as from Thalia, Guardian of Thraben), you can decline to activate mana abilities to pay for it and hence fail to cast the suspended card, leaving it in exile
Other forms of card advantage play to the board, like if you cast a Day of Judgment and your opponent loses three creatures to your one spell
Until the end of your next turn, you may play that card, and you may spend mana as though it were mana of any color to cast it
These became must-have cards in Commander where the few mana rocks that cost less than 3 were a premium
Glissa Sunslayer Glissa Sunslayer does it all in combat
The set will bring back wedge gameplay (Jeskai, Sultai, Temur, Abzan, and Mardu) and dragons all the things players loved about the first trip to Tarkir