Just imagine an aggressive Winota, Joiner of Forces deck with Lurrus as a Companion, for example, or a Meren of Clan Nel Toth Reanimator deck with Gyruda, Doom of Depths tagging along for the ride
You can also use this ability as a method to bounce artifacts with good ETB abilities and immediately slap them back down to get another trigger
BT10-053 U Digimon Lv.5 Ajatarmon Color Green Cost 8 DP 7000 Digivolve Cost 1 Green 3 from Lv.4 Form Ultimate Attribute Vaccine Type Vegetation Card Text 1 [Effect] [Main][Once Per Turn] By suspending 1 of your green Digimon, you may play 1 Digimon card with [Vegetation], [Plant], or [Fairy] in one of its traits and 3000 DP or less from your hand without paying its play cost
Mega Absol ex can be obtained from Pulsing Aura pack in the Pulsing Aura set
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Most of the legends presented here are just individually strong, or interesting in their own builds, but dont give you a strong incentive to run a bunch of allies