Sidisi, Brood Tyrant [Khans of Tarkir Prerelease Promos] 209 which was Summoned this way

which was Summoned this way

select and activate 1 of the following effects: • Increase the ATK of this card by 400 points

Set: XY: Ancient Origins Type: Psychic Rarity: Promo Retreat cost: Colorless

Set: World Championships 2016 Type: Psychic Rarity: Common Retreat cost: Colorless

When Glacial Chasm enters the battlefield

Sidisi, Brood Tyrant [Khans of Tarkir Prerelease Promos] 209 which was Summoned this waySet: Khans of Tarkir Prerelease Promos Type: Legendary Creature Naga Shaman Rarity: Mythic Cost: {1}{B}{G}{U} Whenever Sidisi, Brood Tyrant enters the battlefield or attacks, mill three cards. Whenever one or more creature cards are put into your graveyard from your library, create a 2 2 black Zombie creature token.