Ria Ivor, Bane of Bladehold

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

At the beginning of combat on your turn, the next
time target creature would deal combat damage to
one or more players this combat, prevent that
damage. If damage is prevented this way, create that
many 1/1 colorless Phyrexian Mite artifact creature
tokens with toxic 1 and “This creature can’t block.”