Name:Sunbird's Invocation
ManaCost:5 R
Types:Enchantment
T:Mode$ SpellCast | ValidCard$ Card.wasCastFromHand | ValidActivatingPlayer$ You | TriggerZones$ Battlefield | Execute$ TrigDig | TriggerDescription$ 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 card revealed this way with converted mana cost X or less without paying its mana cost. Put the rest on the bottom of your library in a random order.
SVar:TrigDig:DB$ Dig | DigNum$ X | Reveal$ True | RememberRevealed$ True | ChangeNum$ 0 | RestRandomOrder$ True | References$ X | SubAbility$ DBPlay
SVar:DBPlay:DB$ Play | Valid$ Card.nonLand+IsRemembered+cmcLEX | WithoutManaCost$ True | Optional$ True | Amount$ 1 | ValidZone$ Library | SubAbility$ DBCleanup
SVar:DBCleanup:DB$ Cleanup | ClearRemembered$ True
SVar:X:TriggerCount$CastSACMC
SVar:Y:Number$0
SVar:Picture:http://media.wizards.com/2017/xln/en_wZkZ5jvNGp.png
Oracle: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 card revealed this way with converted mana cost X or less without paying its mana cost. Put the rest on the bottom of your library in a random order.