Logan, Nomadic Assassin

Evasion—{5} (Whenever this creature becomes
blocked, you may pay {5}. If you do, remove it from
combat, then return it to combat attacking that player
or planeswalker. That player may declare a new
blocker for it.)
Whenever an artifact enters the battlefield under
your control, put a +1/+1 counter on Logan,
Nomadic Assassin.
{1}, {t}: Deal 3 damage to any target.