Siege-Horde Summoner

When Siege-Horde Summoner ETBs, create 3
1/1 undead skeletons.
{1}{b}, Sac an undead: Target creature gets -2-2 til
EOT.
The sycophants filling the dark halls of the
Temple of Malice knew that their truly undying loyalty would be repaid with power beyond their dreams.