Yawgmoth Demon [Antiquities] Elemental where X is the total

where X is the total power of creatures you control

At the beginning of your next upkeep

Set: Eternal Masters Type: Enchantment Rarity: Rare Cost: {1}{R}{R} At the beginning of each player's upkeep

Eventually

When Sylvan Primordial enters the battlefield

Yawgmoth Demon [Antiquities] Elemental where X is the totalSet: Antiquities Type: Creature Phyrexian Demon Rarity: Rare Cost: {4}{B}{B} Flying (This creature can't be blocked except by creatures with flying or reach.) First strike (This creature deals combat damage before creatures without first strike.) At the beginning of your upkeep, you may sacrifice an artifact. If you don't, tap Yawgmoth Demon and it deals 2 damage to you.