Once per turn, by Tributing 1 Reptile-Type "Worm" monster you control, you can Special Summon 1 Reptile-Type "Worm" monster with a Level equal to or lower than the Tributed monster from your Deck

Spirit Tribal EDH Creature (25) 1x Adaptive Automaton 1x Angel of Flight Alabaster 1x Celestial Crusader 1x Celestial Kirin 1x Clone 1x Drogskol Captain 1x Drogskol Reaver 1x Geist of Saint Traft 1x Godhead of Awe 1x Kami of Ancient Law 1x Kami of the Crescent Moon 1x Kataki, War's Wage 1x Keiga, the Tide Star 1x Mindshrieker 1x Mirror Entity 1x Myojin of Cleansing Fire 1x Nikko-Onna 1x Oyobi, Who Split the Heavens 1x Sire of the Storm 1x Sovereigns of Lost Alara 1x Spirit en-Dal 1x Sturmgeist 1x Tallowisp 1x Tradewind Rider 1x Yosei, the Morning Star Planeswalker (1) Land (37) Enchantment (9) 1x Celestial Mantle 1x Eldrazi Conscription 1x Oblivion Ring 1x Reparations 1x Spirit Loop 1x Steel of the Godhead 1x Vanishing 1x Volition Reins 1x Zephid's Embrace Artifact (7) 1x Azorius Signet 1x Lightning Greaves 1x Sol Ring 1x Sundial of the Infinite 1x Sword of Light and Shadow 1x Sword of War and Peace 1x Tormod's Crypt Instant (13) Sorcery (8) 1x Concentrate 1x Day of Judgment 1x Dust to Dust 1x Final Judgment 1x March of Souls 1x Spectral Procession 1x Time Spiral 1x Trade Secrets

Now the card is good against creatures like Troll Ascetic and Voice of Duty as opposed to being good with them
I spent the weekend unboxing the media kit of a starter kit, collectors bundle, commander deck, and booster packs, marvelling at the new card artwork and learning the set mechanics of bargain, adventures, celebrations and more
How often are Yu-Gi-Oh
Math is very important to deckbuilding, and this is an example of that