Anime is undoubtedly familiar with the Blue-Eyes White Dragon card

Kashtira Bystial) 51 Superheavy Samurai (29 Superheavy Samurai, 19 Bystial Superheavy Samurai, 2 Vernusylph Superheavy Samurai, 1 ABC Superheavy Samurai) 47 Dragon Link (38 Bystial Dragon Link, 9 Grass Bystial Dragon Link) 45 Labrynth (24 Ishizu Labrynth, 21 Labrynth) 37 Branded (25 Branded, 12 Grass Branded) 22 Floowandereeze 16 Spright (8 Spright, 5 Adventurer Melffy Spright, 2 Melffy Spright, 1 Adventurer Spright) 15 Spright Gishki 14 Mathmech (13 Code Talker Mathmech, 1 Mathmech) 14 Sky Striker 13 Magician (12 Magician, 1 Performapal Magician) 12 EvilTwin (11 Spright EvilTwin, 1 EvilTwin) 12 Swordsoul (9 Tenyi Swordsoul, 1 Swordsoul, 1 Kashtira Swordsoul, 1 Superheavy Samurai Swordsoul) 10 Vaylantz (8 Vaylantz, 1 Kashtira Vaylantz, 1 Superheavy Samurai Vaylantz) 9 Scareclaw (7 Kashtira Scareclaw, 2 Scareclaw) 9 Tri-Brigade Lyrilusc 8 Rikka (5 Sunavalon Rikka, 2 Therion Sunavalon Rikka, 1 Rikka) 8 Shaddoll (2 Grass Dogmatika Magistus Tearlaments Shaddoll, 1 Shaddoll, 1 Branded Shaddoll, 1 Branded Invoked Shaddoll, 1 Grass Tearlaments Shaddoll, 1 Grass Ishizu Tearlaments Shaddoll) 8 Synchron (2 Synchron, 2 Adventurer Synchron, 2 P.U.N.K

(Quick Effect): You can discard this card and target 1 "Raviel, Lord of Phantasms" you control
Zuran Orb is the former, as is the antiquated Ivory Tower although that shouldn't be seeing play
When asked how exactly he thinks they should go about it, Astarion's "plan" boils down to: 1