Community

Sunbird's Invocation
Enchantment
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.
Rulings (8)
If a revealed card in your library has X generic mana in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
Sep 29, 2017
The mana value of a split card, such as cards with aftermath from the Amonkhet block, is based on the combined mana cost of its two halves. The mana value of the resulting spell is based only on the half you cast.
Sep 29, 2017
The ability of Sunbird's Invocation resolves before the spell that caused it to trigger. It will resolve even if that spell is countered. If you cast a spell as part of the resolution of the ability, that spell resolves before the spell that caused the ability to trigger.
Sep 29, 2017
Legality
Formats by platform
Commander
Competitive
Digital
Community & retro
Printings (6)
BLC#116$0.37
Bloomburrow Commander
SCD#159$0.26
Starter Commander Decks