Dathri Den-Weaver

Reach
Tenacious — Whenever a creature with power
four or greater enters the battlefield under an opponents control, you may pay {g}. When you
do, tap that creature.
"Ah, yes. The arachnid giants of the Dathri have
been known to hunt prey nearly twice their size!
Fortunate for a titan, unfortunate for everyone else."
—Marlein, Professor of Entomology