It'll Quench Ya! (TLA)

Instant — Lesson

Counter target spell unless its controller pays {2}.

Solid conditional removal for blue control and tempo decks. A flexible two-mana counterspell that taxes opponents' key spells while staying cheap enough to hold up alongside other interaction—the {2} tax makes it particularly effective against low-curve threats and forces difficult decisions in the mid-game. Playable in Pioneer and Modern control shells where the flexibility of a Lesson card adds utility to your sideboard strategy.

Avatar: The Last Airbender — Common