There aren't a lot of good answers to four-Willpower characters though, so in a lot of cases Don Karnage can run away with a game all on his own
Color Identity: W, U, B, R, G Cards Rydia, Summoner of Mist There and Back Again Barbara Wright Hex Parasite High Alert Initial Card State All permanents on the battlefield (Rydia without summoning sickness and There and Back Again with exactly two lore counters on it)
Specifically, it's MetalGreymon Blue, the original MetalGreymon from before Digimon Adventure introduced the more recognizable orange variant
Including reprints from the last 12 booster packs going back to Power of the Elements while also featuring alt-art versions and reprints of cards from the Japanese Quarter Century Chronicle side:Unity and side:Pride sets that have been sold out since their release in Japanese card stores, this is more than a mere trip down memory lane or collection of recent reprints
But in decks that allow for both red and white pips, Kellan's an excellent option that curves its adventure tutor into itself, which is a great place to put whatever aura/equipment you searched up