Other Pests, Bats, Insects, Snakes, and Spiders you control get +1/+1.

When Blex, Vexing Pest dies, you gain 4 life.

Flash

Vigilance

Aegis of the Emperor — Commanders you control have protection from everything.

Whenever a player casts a spell, if no mana was spent to cast it, counter that spell.

, , Sacrifice Vexing Bauble: Draw a card.

When Vexing Devil enters, any opponent may have it deal 4 damage to them. If a player does, sacrifice Vexing Devil.

Whenever you roll one or more dice, put a number of charge counters on Vexing Puzzlebox equal to the result.

: Add one mana of any color. Roll a d20.

, Remove 100 charge counters from Vexing Puzzlebox: Search your library for an artifact card, put that card onto the battlefield, then shuffle.

Emerge (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)

When you cast this spell, you may return target instant or sorcery card from your graveyard to your hand.

Flying

Cumulative upkeep—Discard a card. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

When Vexing Sphinx dies, draw a card for each age counter on it.