A fissure has opened up and lava is taking advantage. The card's info says:
Select 1 “My Luminous Pony” monster you control. Destroy 1 face up monster your opponent controls with ATK equal to or less than the ATK of the selected monster(if it is a tie, you get to choose).
2 years, 11 months ago
25 Jun 2016 23:59 CEST
Full Size: a65de0c8ae9c3b5c0b162df46d1da76a