Hatchery Spider [Guilds of Ravnica Prerelease Promos] Tempest and that player can't activate

and that player can't activate abilities that aren't mana abilities

(For example

Whenever you tap a land for mana

Set: Betrayers of Kamigawa Type: Instant — Arcane Rarity: Rare Cost: {X}{U}{U} You may exile a blue card with converted mana cost X from your hand rather than pay this spell's mana cost

The seat of Belzenlok's power

Hatchery Spider [Guilds of Ravnica Prerelease Promos] Tempest and that player can't activateSet: Guilds of Ravnica Prerelease Promos Type: Creature Spider Rarity: Rare Cost: {5}{G}{G} Reach Undergrowth When you cast this spell, reveal the top X cards of your library, where X is the number of creature cards in your graveyard. You may put a green permanent card with converted mana cost X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.