Staples in popular formats like Commander, Modern, and Pioneer hold value due to high player demand
Theyre creatures that get stronger whenever you play a land card (think of land like the gas that powers your decks engine) and have incredible synergy with other card types, leading to a deck that will overwhelm your opponent
C Common Vampire Domination X TRAP Counter When a Spell/Trap Card, or monster effect, is activated while you control a "Vampire" monster: Negate the activation, and if you do, destroy that card, then, if it was a Monster Card, gain LP equal to its original ATK
But it does make these on each upkeep, so you can easily amass an army of 3/3
English Neo Genesis: As mentioned above, Ive only seen the grey 1st edition misprint on English Gym Heroes and Neo Genesis sets outside of the English Base Set
Mill is almost always a casual strategy