You can obtain the Virizion (3-Diamonds rarity) card by opening Mega Rising: Mega Altaria from Mega Rising set
Violent Outburst This is where the discussion gets easier, because the remaining cards are blatantly amazing
If you didn't collect Kaldheim maybe you have these two synergistic cards on hand: Pelt Collector and Viridian Emissary
With cards like Fluctuator or Astral Drift, Gavi turns card draw into steady creatures, which ensures that the cycling deck never runs out of pressure or utility
There are of course some fantastic ways to play this and have it be genuinely powerful, mostly involving graveyard synergy or I win combos
Reveal 1 "Neo-Spacian", "Elemental HERO" or Level 10 monster from your hand, Deck or Extra Deck, then this turn if you were to use the target as Fusion Material, you can treat its name as the revealed monster's name, also if "Elemental HERO Neos" is on your field or GY, send the revealed monster from your Deck to the GY, otherwise shuffle it from your hand into the Deck
