first edition gastly pokemon card - SWSH06: Chilling Reign Base Set 1st Edition Type Gastly - Base Set (Shadowless)

This legendary gnoll could be an interesting Gruul commander for a Pauper EDH deck or super casual Voltron deck

All of a sudden, all your songs with cost three ink or less have the potential to double their effect

Some threaten the creature while others threaten the player

Each of them gets +X/+X and gains vigilance until end of turn, where X is this creature's power

This rule was clearly added to prevent players from gaining too much advantage in having more resources in hand than the other players, and so this rule can often be seen as a downside since you are losing cards due to a simple yet sometimes unavoidable rule