yu gi oh millennium duels prophecy deck YuGiOh Destroyer - CT09-EN019 - Secret Rare Yu-Gi-Oh!: Millennium Duels official promotional

This means you must use at least 2 monsters and they must be Effect Monsters, so no Normal Monsters are allowed, but you can use monsters like Sangan and other Link Monsters as Link Material

However, your Elo rating will always change, regardless of whether your tier can drop or not

Mega-Evolved Pokmon cards have more HP and more powerful attacks than ordinary Pokmon-ex

Gyzarus effect

Pegasus knows destroying Yami's defense monster won't affect his life points, but says he'll do it anyway, just for fun

It also has a secondary attack known as Darkness Blade, but it restricts Yveltal from attacking in the following turn and therefore should be avoided as it ruins the setup the player had made in the previous turn