This card cannot be used in a Duel.

Shelga, the Tri-Warlord
WATER/Psychic
Level 7
Pendulum/Normal
Scale 10
2800/2500
Pendulum Effect: Once per turn: You can banish 3 Psychic-Type Pendulum Monsters you control, then target 1 Pendulum Monster you control; if it attacks your opponent directly and reduces their LP to 0 this turn, you with the Match.
Flavor text: “The shockwaves of powerful battles have warped reality, allowing the proud valiant to emerge from the Dimensional Sea.”

This card cannot be used in a Duel.

Both cards are Platinum Rare.

Source: https://yugiohblog.konami.com/?p=25011#more-25011