Thwart
Mana cost {2}{U}{U}.
You may return three Islands you control to their owner's hand rather than pay this spell's mana cost.
Counter target spell.

Thwart is a blue card, legal in Premodern, shown in its old-frame Mercadian Masques printing.
Price and printings: Cardmarket (€3.38) · TCGplayer ($3.92) · Scryfall
Tracked daily since 15 September 2026: on Cardmarket between €3.17 and €3.81 in that time.
How often Thwart is played
Thwart is used by 1 of 33 tracked archetypes.
See how it compares on the Premodern staples list.
Premodern archetypes that play Thwart
- Stasis: Counters a spell for three Islands returned to your hand. Under Stasis those Islands are tapped and useless anyway, so it is free; before Stasis it is a real tempo cost.