yu gi oh yugi deck Complete Custom for Yu-Gi-Oh! YGOrganization | Yugi Muto Deck

Legality depends on the tournament format -- Jace, the Mind Sculptor can be legal in some formats and banned or restricted in others

With infect creatures, you only get one route to victory since they dont reduce life totals

Both are determined to defeat one another in a Duel to find out who the true "Galaxy-Eyes" master is

Enchantment Merry, Warden of Isengard Partner with Pippin, Warden of Isengard (When this creature enters, target player may put Pippin into their hand from their library, then shuffle.) Whenever one or more artifacts you control enter, create a 1/1 white Soldier creature token with lifelink

For combo style decks only, I think