these were introduced in Pokemon Scarlet and Violets Base Set and have become a staple of the sets that have followed
(Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.) Legendary Creature - Human Rogue Marionette Master Fabricate 3 (When this creature enters, put three +1/+1 counters on it or create three 1/1 colorless Servo artifact creature tokens.) Whenever an artifact you control is put into a graveyard from the battlefield, target opponent loses life equal to this creature's power
So long as you have at least two creatures on the battlefield, Gaea's Cradle will generate more mana to most lands in the game
Mulldrifter already enables a ton of shenanigans, and worst case you can always evoke it for two cards
Later sets like Jungle and Fossil were printed with the shadow from the start, so they have 1st Edition and Unlimited versions but no shadowless version
This means that every zombie creature in a player's deck could potentially provide twice as much value as it would otherwise