leo yugioh deck (Duel Generation) Leo (Duel Links) - Yugipedia

They are also strong at the ramping, and multiple one drop mana makers with no restriction on this break decks and formats, like Birds of Paradise and the Llanowar Elves speeding up Fires of Yayimaya to dominate Standard as a second turn drop

Thats what makes it so good

Dropping it for 4 mana after a discard not only puts a 3/3 on the board but also returns a spell from your graveyard to hand

Flat misses are a problem though

Roaring Atlantean Poseidra Level 7 WATER Sea Serpant / Effect You can only use each of the [1] [2] effects of this card once per turn

This deck has taken the Yu-Gi-Oh community by storm as when its in the right hands, just three copies of the deck are enough to get some wins at locals