Once each turn, when you activate an ability of a creature you control, untap that creature and put a +1/+1 counter on it.

Vigilance
Landfall — Whenever a land you control enters, you may discard a card. If you do, draw a card.
{R}{W}: You may play land cards from your graveyard this turn.

Surveil 1, then draw a card. Exile Harbor Mail with a stamp counter on it.
When you cast a spell for its surface cost, if Harbor Mail is exiled with a stamp counter, you may pay {U} and put it into your graveyard. If you do, surveil 1, then draw a card.