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But theres one important factor in how Courtesan Thais text is worded

literally nothing

Once per turn, during your next Standby Phase after this card was banished: You can Special Summon this banished card, then if "Numeron Network" is in your Field Zone, inflict damage to your opponent equal to the combined ATK of all banished Xyz Monsters

Stalactite Stalker One black, Creature - Goblin Rogue - 1/1 - Rare Menace At the beginning of your end step, if you descended this turn, put a +1/+1 counter on Stalactite Stalker

Order of 6 will be in a sealed case

Since Small World is a Normal Spell, it goes to the Graveyard like any other