Trample, Haste Whenever Scalesoul Gnome deals combat damage to a player, discover X, where X is that damage. Whenever you play a card from exile, conjure a duplicate of it into your hand.
Flying Whenever Scalpelexis deals combat damage to a player, that player exiles the top four cards of their library. If two or more of those cards have the same name, repeat this process.
To treefolk's sense of time, ages pass as hours. They stood as witnesses to the apocalypse, the years of which they saw as one cacophonous, ultra-destructive moment.
Flying When Scholar of the Lost Trove enters, you may cast target instant, sorcery, or artifact card from your graveyard without paying its mana cost. If an instant or sorcery spell cast this way would be put into your graveyard, exile it instead.
Flying Dethrone Whenever Scourge of the Throne attacks for the first time each turn, if it's attacking the player with the most life or tied for most life, untap all attacking creatures. After this phase, there is an additional combat phase.
Flying, menace Whenever Screeching Scorchbeast attacks, each player gets two rad counters. Whenever one or more nonland cards are milled, you may create that many 2/2 black Zombie Mutant creature tokens. Do this only once each turn.
Sealock Monster can't attack unless defending player controls an Island. {5}{U}{U}: Monstrosity 3. When Sealock Monster becomes monstrous, target land becomes an Island in addition to its other types.
Vigilance Whenever you cast a creature spell, create a 1/1 red Mercenary creature token with "{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery." {T}: Choose a color. Add one mana of that color for each different power among creatures you control.