If the damage on a character equals or exceeds its Willpower, the character is banished during the appropriate game-state check
Four mana for a one-sided Howling Mine is already not the worst place to start, although that on its own would hardly be impressive
Of course, purchasing Jumpstart sets wont quite work for making Booster, Standard or Commander decks and would likely end in sadness for anyone attempting such a feat
Instead of equipping one creature in a Voltron style deck, you now want to be equipping many equipment cards across a variety of creatures
The transparent front and opaque back ensure its tournament-ready
Although higher numbers of Endurances are found in sideboards than in the maindeck, I wouldnt be surprised if decks include more Endurances maindeck already considering how much flexibility this card gives