Just how good the all-spell player is at racing is what determines how frustrating the deck can be to play against
Its definitely a mid- to late-game deck
Card Name Hand of Vecna Mana Cost Type Legendary Artifact Equipment Rarity Rare rules Text At the beginning of combat on your turn, equipped creature or a creature you control named Vecna gets +X/+X until end of turn, where X is the number of cards in your hand.Equip-Pay 1 life for each card in your hand.Equip Set Number 394 Language Italiano Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (7/23/2021) If you control both Vecna and Hand of Vecna equipped to another creature, you choose which creature to apply the bonus to as the triggered ability resolves
(2018-03-16) The creature enters the battlefield, so it will trigger enters-the-battlefield abilities even if you choose not to pay