Questing Beast If Elder Gargaroth is a planeswalker on a creature, this is a planeswalker assassin
Lion Sash is one of the better ones for its affordable mana value and ability to mimic Scavenging Ooze and the instant-speed shenanigans it enables, all at a low Reconfigure cost
In Lorcana, every card can either be a Foil card or a standard non-foil card
In rare cases where one player controls Luxior and another player controls the creature Luxior is attached to, Luxior might be attacked by the creature it's attached to
Once you get to 12 counters, these planets become some of the most powerful lands in the game (Tolarian Academy, Gaea's Cradle)
Knights is a Creature-centric strategy, but I do really like the surprise factor Sidar Jafar of Zhalfir incorporates with its reanimate ability, making for some nasty game swings with each powerful Knight you resurrect in combat