mtg explore card Valakut Exploration [Zendikar Rising] I will never run out of new oceans to explore or new sea MTG Explore Worldwake 99/145 Regular

It's situational removal that can kill multiple pesky creatures and it's rather easy to pull off in practice because you get to untap the newly elected blockers and your opponent doesn't even need to attack you in order to pull this off

The two Ursulas are planning something and recruiting other malicious Glimmers, like Prince Hans and the Queen of Hearts

But, you might have better luck with the once off style copy effects

However, you're also getting creatures that will keep your hand topped up like Treeshaker Chimera and Solemn Simulacrum, and make sure that life counter is looking healthy as well (Thragtusk can land you 5 life when it enters and replaces itself with a 3/3 Beast creature token on death)