脑蛭

"Share knowledge"

• Choose 1 card from 5 random cards to add to your deck

"Rip off the leech"

• Lose 5 HP. Gain 1 Colorless card

Ripping off the leech is the strong pick in most situations. Colorless cards draw from a shared pool across all characters and include quality picks for hand manipulation, draw, and versatile damage. Accessing that for a mere 5 HP is excellent value.

Sharing knowledge offers a choice of 1 out of 5 cards, which is a wider selection than a normal card reward (1 of 3). When you want to dig into your character's pool for a specific synergy card, this is more likely to hit. Not losing any HP is another merit.

• 5 HP is among the lightest costs of any event. With any HP to spare, taking the Colorless card is fine
• Colorless cards include many universally strong picks, so their flexibility shines most in the early game when the deck's direction is unsettled
• If your deck is already committed and you want a specific character-specific card, Share knowledge is more likely to land a high-synergy pick
• The 5-card selection has a wide range, so you can usually find at least one deck-fitting card. Colorless is a single random card, so what you get comes down to luck
• An Act 1 appearance is good for picking up Colorless cards to shore up the deck's base, while an Act 2 appearance is good for digging for deck-direction-specific picks from your character pool