Ancient Chant

Add 1 "The Winged Dragon of Ra" from your Deck or GY to your hand, and if you do, during your Main Phase this turn, you can Tribute Summon 1 monster, in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) You can banish this card from your GY; if you Tribute Summon "The Winged Dragon of Ra" this turn after you resolved this effect, its original ATK/DEF become the combined original ATK/DEF of the monsters Tributed for its Tribute Summon. You can only activate 1 "Ancient Chant" per turn.