Six - [Foil, Borderless] Modern Horizons 3 (MH3) Sorcery each opponent sacrifices a tenth

each opponent sacrifices a tenth of the creatures they control

Cumulative upkeep—Add {R}

Pay 2 life: Put a +1/+1 counter on Bloodtracker

Karn felt more secure about his value to Urza when he realized he didn't need regular trimming

Six - [Foil, Borderless] Modern Horizons 3 (MH3) Sorcery each opponent sacrifices a tenthReach Whenever Six attacks, mill three cards. You may put a land card from among them into your hand. As long as it's your turn, nonland permanent cards in your graveyard have retrace. (You may cast permanent cards from your graveyard by discarding a land card in addition to paying their other costs.)