When it deals damage to a player you get an additional beginning phase after your combat, giving you the opportunity to untap all your lands, triggering upkeep effects, and letting you draw an additional card.
Not only does the big manabase shift enable powerful cards like these, it also opens the door for potent sideboard hate cards like Rest in Peace, Stony Silence, or Alpine Moon to help make up for the lack of disruption Slivers can access
However, if there are easy repeatable methods of gaining life (even Ajanis Mantra, given that there will presumably be more lifegain/drain payoffs), then Epicure of Blood could be a surprisingly decent win condition in a grindy deck, or a way to get in those last few points of damage
the first states that you may reveal the card if its the first card you draw in a turn
Final Fantasy VIII The Final Fantasy VIII selections lead off with moody main character Squall, SeeD Mercenary
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