It's basically the boardbreaker and the win condition of the deck
Triangle is not very effective, Circle is normal effectiveness, and a circle with a dot in the middle is supereffective
10 Lavalval Chain Powered Up GY Focused Strategies First Printing: Duel Terminal 7 Over the years, sending cards directly from the deck to the GY has become a core part of many different combo decks because the GY can occasionally become a secondary resource pool for some strategies
Unlike Diabos and Attractors, which Tribute Summon to you, depending on the situation, it may be worth a normal Tribute Summon
Obviously these cards were printed months in advance in time for shipping and logistics, sheet cutting, placing into packs / stater decks, ink testing etc