Then, it enters the battlefield with +1/+1 counters equal to the highest mana value among all cards in exile, both yours and your opponents
After much anticipation and build-up, the crossover is finally heresort of
Its a very simple way of ramping, and while its no good for those aiming for one of every color by turn five, its still an absurdly potent way of gaining mana
If we stopped there, I would have picked something else (probably Scepter of Eternal Glory)
For example, seeing things like Infinity Elemental plus some poor hapless opponent's Chameleon Colossus means we have a creature that could (somehow) feasibly become a creature with two-infinity ( and beyond
Its also an X spell, which means you can cast it at many different points in the game for medium value