Its enters trigger refills your hand and often puts you far ahead the moment it resolves
It allows you to cheat on mana in a big way that can swing the game
And the way they handled theme decks on the EX era was very distinct
House, President and CEO Negan, the Cold-Blooded Neriv, Crackling Vanguard Neriv, Heart of the Storm Olivia, Opulent Outlaw Oros, the Avenger Piru, the Volatile Ponyback Brigade Queen Marchesa Reigning Victor Shanid, Sleepers' Scourge Snapdax, Apex of the Hunt Snapdax, Apex of the Hunt Sonic Shrieker Squall, Gunblade Duelist Syr Gwyn, Hero of Ashvale Tariel, Reckoner of Souls Terra, Herald of Hope Thanos, the Mad Titan Vihaan, Goldwaker Zurgo Helmsmasher Zurgo Stormrender Zurgo, Thunder's Decree
Let your children mix colors if they enjoy experimentation
Focusing on Day/Night to power your whole deck is one thing