Try Neheb, the Eternal or Sword of Feast and Famine with Aggravated Assault or Waves of Aggression to keep things rolling
And while he may only enable you to sacrifice one permanent per turn, team him with sacrifice engines like Viscera Seer, tokens or recurring permanents (like Bloodghast or the cat oven combo of Witchs Oven and Cauldron Familiar) to sacrifice, and drainers like Blood Artist and Mayhem Devil, and things snowball very fast
R Rare Twin-Shield Defender X EARTH Level 4 [ WarriorEffect ] ATK 700 DEF 1600 When this card you control is destroyed by battle and sent to your Graveyard, you can halve the current ATK of 1 face-up monster your opponent controls, until the End Phase
As for full art cards featuring the new Legends: Z-A Megas, your guess is as good as mine
Other creatures are Food artifacts in addition to their other types and have " , , Sacrifice this permanent: You gain 3 life." Whenever a Food is put into a graveyard from the battlefield, put two +1/+1 counters on Ygra