Killing a creature on entering is one of the best abilities you can have in Limited
Amonkhet Remastered Kaladesh Remastered Jumpstart: Historic Horizons Alchemy: Innistrad Alchemy: New Capenna Alchemy Horizons: Baldurs Gate Explorer Anthology Alchemy: Dominaria Alchemy: The Brothers War Alchemy: Phyrexia Shadows over Innistrad Remastered Shadows of the Past In addition to these sets, Historic Anthologies are added to the game to support the Historic format
Creature - Human Cleric owyn, Shieldmaiden First strike At the beginning of combat on your turn, if another Human entered the battlefield under your control this turn, create two 2/2 red Human Knight creature tokens with trample and haste
That includes "Meddling Youths" who are unmasking someone wearing a suspiciously familiar costume
As always, the disclaimer: Im aggressively casual and all of my assertions in this list likely will not consider the competitive side of the format or super pushed cards like Omnath or Kinnan
These are "tailored" experiences, in the sense that each Commander deck mainly has cards from its respective game