Yawgmoth, Thran Physician Aetherdrift Xantcha attacks each combat if

Xantcha attacks each combat if able and can't attack its owner or planeswalkers its owner controls

Then if creatures you control have total toughness 20 or greater

Type: Land Rarity: Rare

it deals 3 damage to any target and you gain 3 life

or the first Otter spell other than Alania you've cast this turn

Yawgmoth, Thran Physician Aetherdrift Xantcha attacks each combat ifProtection from Humans Pay 1 life, Sacrifice another creature: Put a 1 1 counter on up to one target creature and draw a card. {B}{B}, Discard a card: Proliferate. (Choose any number of permanents and or players, then give each another counter of each kind already there.)