The List

Chartooth Cougar

{R}: Chartooth Cougar gets +1/+0 until end of turn.
Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Masters 25

{R}: Chartooth Cougar gets +1/+0 until end of turn.
Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle your library.)

Duel Decks Anthology: Jace vs. Chandra

{R}: Chartooth Cougar gets +1/+0 until end of turn.
Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, and put it into your hand. Then shuffle your library.)

Vintage Masters

Conspiracy

Duel Decks: Venser vs. Koth

Commander 2011

Magic Online Theme Decks

Duel Decks: Jace vs. Chandra

Scourge

{R}: Chartooth Cougar gets +1/+0 until end of turn.
Mountaincycling {2} ({2}, Discard this card from your hand: Search your library for a mountain card, reveal it, and put it into your hand. Then shuffle your library.)