Crosis, the Purger [Commander 2017] 15th Anniversary You cannot Summon other monsters

You cannot Summon other monsters the turn you activate this card (but you can Set)

Set: Duel Power Card type: Link/Effect Monster Rarity: Ultra Rare Attack: 2400 2+ monsters If you control this card that was Link Summoned using "Cyberse Wizard" as material (Quick Effect): You can target 1 monster your opponent controls

your opponent gains Life Points equal to the attacking monster's ATK

but how could that be

Crosis, the Purger [Commander 2017] 15th Anniversary You cannot Summon other monstersSet: Commander 2017 Type: Legendary Creature Dragon Rarity: Rare Cost: {3}{U}{B}{R} Flying Whenever Crosis, the Purger deals combat damage to a player, you may pay {2}{B}. If you do, choose a color, then that player reveals their hand and discards all cards of that color.