When Mwonvuli Beast Tracker enters the battlefield, search your library for a creature card with deathtouch, hexproof, reach, or trample and reveal it. Shuffle your library and put that card on top of it.
Primordial Hydra enters the battlefield with X +1/+1 counters on it. At the beginning of your upkeep, double the number of +1/+1 counters on Primordial Hydra. Primordial Hydra has trample as long as it has ten or more +1/+1 counters on it.
"A long and difficult incision revealed that all vital organs are housed in the head, save for a long chain of stomachs, forty in all, leading from its throat to the end of the tail." —Mulak Ffar, Vastwood Biodiversity
[+3]: Destroy target noncreature permanent. [–2]: Gain control of target creature. [–9]: Nicol Bolas, Planeswalker deals 7 damage to target player or planeswalker. That player or that planeswalker's controller discards seven cards, then sacrifices seven permanents.