snake yugioh cards Night Sword Serpent [MP22-EN232] Common then target 1 Level 4 or lower Cyberse monster in your GY Snake-Eyes Poplar - Phantom Nightmare

A slight wrinkle in all this is the remakes

Special Summon 1 Spellcaster monster from your hand or Deck, whose original Level is 1 lower than that monster's, also during your next turn after this card resolves, you cannot Normal or Special Summon monsters, except Spellcaster monsters

Certain series worth waxes and wanes based on the release, top chase cards, and even shortages

Creature Artifact - Construct Phyrexian Color tag templates(None) Sensor Splicer When this creature enters, create a 3/3 colorless Phyrexian Golem artifact creature token

For me, Ill stick to the numbers

Yavimaya Elder (Ext, S, Block) A mainstay of The Rock (a black-green deck that thrives off of card-advantage creatures), the Elder potentially nets you a four for one advantage: it can block and kill a creature, then sacrifice to draw a card plus two lands