17 cards where the text matches the regex /counter.*target.*activated ability/

Voidslime (Ravnica Remastered #237)
Azorius Guildmage (Ravnica Remastered #165)
Deny the Witch (Warhammer 40,000 Commander #116)
Sister of Silence (Warhammer 40,000 Commander #26)
Ertai Resurrected (Dominaria United #199)
Overcharged Amalgam (Commander Legends: Battle for Baldur's Gate #729)
Tale's End (Core Set 2020 #77)
Disallow (Aether Revolt #31)
Voidmage Husher (Time Spiral #92)
Rimewind Cryomancer (Coldsnap #43)
Squelch (Champions of Kamigawa #92)
Ouphe Vandals (Fifth Dawn #90)
Brown Ouphe (Mirrodin #115)
Bind (Invasion #182)
Interdict (Tempest #69)
Ayesha Tanaka (Chronicles #73)
Rust (Legends #203)

The arc of my blade has carved a path of light to the end of these results.