Thantis, the Warweaver (PZ2)

Vigilance, reach
All creatures attack each combat if able.
Whenever a creature attacks you or a planeswalker you control, put a +1/+1 counter on Thantis, the Warweaver.

Legalities

• brawl: banned
• commander: legal
• legacy: legal
• modern: legal
• pauper: legal
• pioneer: banned
• standard: banned
• vintage: legal

Rulings

• 2018-07-13:

  If a creature can’t attack for any reason (such as being tapped or having come under that player’s control that turn), then it doesn’t attack. If there’s a cost associated with having it attack, the player isn’t forced to pay that cost, so it doesn’t have to attack in that case either.

• 2018-07-13:

  Each creature’s controller still chooses which player or planeswalker the creature attacks.

• 2018-07-13:

  You can’t attack yourself or your own planeswalkers to give Thantis +1/+1 counters, but Thantis appreciates the way you think.

Links

• Scryfall
• Gatherer

Other Printings

• Thantis, the Warweaver (C18)