Slithice, Naga Siren

At the beginning of your upkeep, create three
X/X Illusion creature tokens with haste, wither,
and vanishing 1, where X is equal to Slithice,
Naga Siren's power and toughness.
Wither (This deals damage to creatures in the
form of -1/-1 counters.)
{2},{t}: Prevent all combat damage that would be
dealt this turn.