For starters the first effect, which also got the famous name "Victim's Sanctuary" is the perfect effect that represents what Atem did
Edition 25th Anniversary Rarity Collection VRAINS - Valiant Smashers - 1st
This is what I want to see out of an Omen card, where one half is strong on its own (the creature side), but there are plenty of times you are happy playing the Omen side
C Common Heroic Challenger - Knuckle Sword X EARTH Level 1 [ WarriorEffect ] ATK 600 DEF 200 If you control a "Heroic" monster, except a Level 1 monster: You can Special Summon this card from your hand
there was a little bit of everything
For me, I tend to start with a simple Excel template (no art) that lets me print out a page with a dozen cards, cut them up, and drop them into sleeves with Magic cards