While you do have to tribute summon these guys to get them on the field, you can use field-spell cards like Mausoleum of the Emperor to get them on the field insanely quickly or monsters such as Double Coston to make tribute summoning them a breeze
Every last piece of it is designed to slaughter life forms
This Trap card lets you Special Summon a Monster from the opponent's Graveyard, and then send a card on your field (which can be the one you Summoned) as well as your opponent's so long as they share the same Type
Also, unlike most lords, this fantastic Cat gives that boon to itself too, so make sure to have some Equip cards lying around, like Lightning GreavesLightning Greaves, ShukoShuko or Leather ArmorLeather Armor if you plan on playing this forgotten seven-mana Cat
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These are Legendary creatures with the same color identity as the deck's face card, allowing you to play them instead of the deck's original commander