Enchantment

Sunbird's Invocation

Sunbird's Invocation trading card
Enchantment6 exact printings

Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's mana value. You may cast a spell with mana value 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.

From Magic: The Gathering.

Exact printings

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o37cz14d1pb1h86wdfu05.