River Boa

Flying, vigilance

Flying Sacrifice this creature: Destroy target black creature.

At the beginning of your upkeep, for each land target player controls in excess of the number you control, choose a land that player controls, then the chosen permanents phase out. Repeat this process for artifacts and creatures. (While they're phased out, they're treated as though they don't exist. They phase in before that player untaps during their next untap step.)

When this enchantment enters, destroy each permanent with the same name as another permanent, except for basic lands. They can't be regenerated. Whenever a permanent other than a basic land enters, destroy all other permanents with that name. They can't be regenerated.

Flying, protection from red

Return this enchantment to its owner's hand: Prevent all combat damage that would be dealt by target unblocked creature this turn.

The next time a source of your choice would deal damage to any target this turn, prevent that damage. If damage from a red source is prevented this way, Honorable Passage deals that much damage to the source's controller.

Choose one — • Target creature gains first strike until end of turn. • Target player gains 2 life. • Destroy target Aura.