Sunbird's Invocation [Ixalan Prerelease Promos] Avatar Minion Underground River deals 1 damage

Underground River deals 1 damage to you

(Additional mana in the cost may be paid with any color of mana or colorless mana

If target opponent controls more lands than you

Whenever another nontoken creature enters the battlefield under your control

Sunbird's Invocation [Ixalan Prerelease Promos] Avatar Minion Underground River deals 1 damageSet: Ixalan Prerelease Promos Type: Enchantment Rarity: Rare Cost: {5}{R} Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's converted mana cost. You may cast a spell with converted mana cost X or less from among cards revealed this way without paying its mana cost. Put the rest on the bottom of your library in a random order.