Check out this Extra Turns game over on the Command Zones YouTube channel
A three mana 0/4 with Vigilance isn't good -- but getting three 1/1 attackers every turn is, especially because there are so many good ways to take advantage of them in the format
A great deal of the deck in its current form is from Theros, but Mastery and Whisperwood are really the key cogs in the machine

Nami (OP03-040) OP03 Leader Alt Art (AA) Charlotte Katakuri (OP03-099) OP03 Leader Alt Art (AA) Portgas D Ace (OP03-001) OP03 Leader Alt Art (AA) Arlong (OP03-022) OP03 Leader Alt Art (AA) Charlotte Linlin (OP03-077) OP03 Leader Alt Art (AA) Rob Lucci (OP03-076) OP03 Leader Alt Art (AA) Kuro (OP03-021) OP03 Leader Alt Art (AA) Iceburg (OP03-058) OP03 Leader Alt Art (AA) Kalifa (OP03-081) OP03 Alternate Art (AA) Charlotte Linlin (OP03-114) OP03 Alternate Art (AA) Charlotte Pudding (OP03-112) OP03 Alternate Art (AA) Rob Lucci (OP03-092) OP03 Alternate Art (AA) Fire Fist (OP03-018) OP03 Alternate Art (AA) Marco (OP03-013) OP03 Alternate Art (AA) Charlotte Perospero (OP03-113) OP03 Alternate Art (AA) Charlotte Cracker (OP03-108) OP03 Alternate Art (AA) Spandam (OP03-086) OP03 Alternate Art (AA) Issho (OP03-078) OP03 Alternate Art (AA) Paulie (OP03-066) OP03 Alternate Art (AA) Zeff (OP03-047) OP03 Alternate Art (AA) Usopp (OP03-041) OP03 Alternate Art (AA) Krieg (OP03-025) OP03 Alternate Art (AA) Gin (OP03-024) OP03 Alternate Art (AA) Kaku (OP03-080) OP03 Alternate Art (AA) OP-02: Paramount War OP-02: Paramount War features a mix of alternate arts, collector cards, and popular One Piece characters

While its trendy these days for young people to say crazy things like, Hymn to Tourach is better than Mind Twist, this just reveals their youthful innocence
You remember this is the effect of Enter the Dungeon