All of them (except "Victory Dragon", which was eventually Forbidden in both formats) have the limitation text "This card cannot be used in a Duel" on their lower-left corner, making them Illegal in official tournaments
The set included Wrath of God as Shrinking Storm, Dance of Many as Dance Battle Etherium Sculptor as Supply Llama, Grim Tutor as Crack the Vault, Triumph of the Hordes as Battle Royale, Smugglers Copter as Battle Bus, and Planar Bridge as The Cube
In a deck with a heavy concentration of creatures, lands, and other permanents, youll all but be guaranteed to hit those two targets
You can recycle strong ETB effects like the ones on Gray Merchant of Asphodel and Solemn Simulacrum, or punish your opponents for not giving you your creatures back
This card feels more like a standalone art piece than anything else, which is astounding