While this version only works on your turns, it's still a fantastic iteration of an arguably broken effect
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Gev's second ability cares whether opponents lost life this turn, not how their life totals changed
If were allowed to get out of hand, theres also the opportunity to get the Springheart Nantuko on any of these (oh, if its the Baloths!) to make token copies of them with every land, turning a modest 5-land entry on a turn from 5 4/4 beasts to 5 copies of Frenzied Baloths, plus 1 + 2 + 3 + 4 + 5 beasts, for a total of 15 4/4 beasts suddenly appearing on the field
For example, since Mangara only has 2 power it can be a strong utility creature to cheat out in Alesha, Who Smiles At Death
Its also easier to meet the requirements of casting Twice Upon a Time you essentially just need two creatures on the field