At the beginning of your upkeep, sacrifice Piru unless you pay .
When Piru dies, it deals 7 damage to each nonlegendary creature.
Piru is a 7/7 flyer with lifelink that demands an upkeep tax but turns dying into a one-sided board wipe dealing 7 to every nonlegendary creature. You play attrition, drain the table with lifelink while protecting your own legendary creatures, and use sacrifice or recursion to repeatedly reset boards. Win by grinding opponents out with the wrath-on-a-stick and commander damage in the air.
Recurring 7-damage board wipe that spares your legends and planeswalkers
Evasive lifelink body stabilizes you and races aggressive decks
Mardu color identity gives deep access to recursion, removal, and reanimation
Punishes go-wide token and creature decks brutally
Eight mana and an ongoing upkeep tax strain your mana base
Dies easily to its own neglect, and the damage hits your nonlegendary creatures too
Color identity lacks blue countermagic and card draw efficiency
If opponents play legendary-heavy or noncreature strategies, the death trigger whiffs
Goldhug, Founder's Faithful
Stand-in for legendary creatures that survive Piru's wipe and let you rebuild while opponents lose everything.