Tom Nook

Indestructible, Menace, Shroud, Trample

When Tom Nook enters the battlefield, or at the
beginning of you upkeep, each player is dealt X
damage and Tom Nook gains X +1/+1 tokens,
where X is the amout of euros that are owed to
the controlling player.

Interest — {t}{x}{g/u}{g/u}, each player that still owes
the controlling player money now owes X
euros more.