Ancient Chant (MZMI-EN069) - Maze of Millennia 1st Edition

Add 1 "The Winged Dragon of Ra" from your Deck or GY to your hand, and if you do, you can Tribute Summon 1 monster during your Main Phase this turn, 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, its original ATK/DEF become the combined original ATK/DEF of the monsters Tributed for its Summon. You can only activate 1 "Ancient Chant" per turn.