However, they require multiple Energy types to use their attacks, which make them highly inconsistent when Energy generation is randomized and thus require the entire deck to revolve around them or to have some other utility that does not involve attacking, such as "Druddigon" ( Mythical Island )
Legendary Creature - Vampire Assassin Fallen Shinobi Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever this creature deals combat damage to a player, that player exiles the top two cards of their library
And as it's free to put it in play, and free to put into your graveyard, it's absolute fodder for infinite loops
Once a historic creature you control attacks, it will keep the +2/+2 for the entire turn, even if it stops being historic later that turn
[M][C][C] Guard Claw: 120 damage