Venser, the Sojourner

A permanent exiled by the first ability will return to the battlefield under your control at the beginning of the next end step even if you no longer control Venser at that time.

If the first ability exiles a token, that token will cease to exist. It won’t return to the battlefield.

If you control more than one such emblem, each one’s ability will trigger separately whenever you cast a spell.

The first ability can target any permanent you own, including those another player controls.

Venser’s second ability doesn’t lock in what it applies to. That’s because the effect states a true thing about creatures, but doesn’t actually change the characteristics of those creatures. As a result, all creatures can’t be blocked that turn, including creatures you don’t control, creatures that weren’t on the battlefield at the time the ability resolved, and creatures that have lost all abilities.