William Edward Goat, Work-Shy

When William Edward Goat enters the battlefield, untap all lands your opponents
control.
You can't tap your lands to cast spells.
You can tap your opponent's lands to cast spells.
Whenever an opponent taps a land for mana, if
the mana was spent to cast a spell they don't
own, draw a card.
{2}{b/g}: Target opponent gains control of target
land you control.