Seregios, Razorwind Invader

Flash, Flying, Haste, First Strike, Agility {r/w}
Seregios, Razorwind Invader can only be cast during the declare blockers step during combat on
an opponent's turn.

Players cannot gain life. Whenever a player is dealt damage, they are dealt that much damage plus 1 instead. Whenever one or more -1/-1 counters are
put on a creature, that many counters plus 1 are put
on that creature instead.