This is a thread to make
Instant - Trap and
Creature - Rogue spells in, as well as other things of related flavor. Some potential examples below.
Dream Trap Instant - TrapIf target spell is a spell that affects your hand or or library, you may pay
rather than play Dream Trap's mana cost.
Counter target spell. It's controller discards a card from their hand and places the top 5 cards of their library into their graveyard.
Trapster Creature - Human RogueVigilance
When Trapster enters the battlefield, you may search your library for up to 5 Trap cards. If there are at least 3 removed, randomly choose one of those cards, place it in your hand, and shuffle the rest back into your library, otherwise shuffle them back into your library without placing any in your hand.
Opponents may not play Trap cards.
2/1Boulder Trap Instant - TrapIf exactly one creature is attacking, you may pay
rather than Boulder Trap's mana cost.
Deal 7 damage to target attacking creature. Creature's controller may remove the creature from combat in order to avoid this damage (if tapped, it remains tapped).
Second Story Acrobat Thief Creature - Human RogueReach
When Second Story Acrobat Thief deals combat damage to an opponent who controls any artifacts or non-basic lands, draw a card.
Second Story Acrobat Thief can't be blocked by walls.
1/2Spore Zone Instant - TrapIf a Fungus creature you control went to the graveyard this turn, you may pay
rather than Spore Zone's mana cost.
Tap all creatures controlled by target opponent and place -1/-1 counters on them, those creatures do untap during their controller's next un-tap phase.
Elf Death-Arrow Creature - Elf RogueReach, Forestwalk, Swampwalk
: Elf Death-Arrow gains Deathtouch until end of turn.
3/2