mtg cards with threshold Ever-Watching if they attacked you and/or a planeswalker you control I Want to Threshold Your

Add in more Yarok, effects like Panharmonicon and you can double your doubling

Magic has seen at least one cat that has no problem going to the graveyard (remember that Cauldron Familiar that needed to be rebalanced?)

You can either go heavy zombies and have the drain sac plan as a backup or your can just play Belcher in a zombie light Blood Artist deck and have it be a good all round card that adds a little punch and utility to the mix

You have to do a little work, but getting to destroy a creature whenever you attack with a massive zombie feels right

What Happens if I Move a -1/-1 Counter Onto a Creature With a +1/+1 Counter