Warren, Lord of the Horde

Defender, hexproof, protection from tokens
When Warren, Lord of the Horde enters the battlefield, choose a creature type for each player.
Whenever one or more creatures enter the battlefield, each player puts a 1/1 token of their
chosen type into play. Goad those creatures. Creatures entering the battlefield this way do not
cause this ability to trigger.
Creature tokens attack each turn if able.