Koala, Toxic Traveller

Unblockable, hexproof
At the beginning of your upkeep, choose one —
•Koala gets +X/+X and gains trample over planeswalkers until end of turn, where X is the
number of turns Koala has been on the
battlefield for. Other creatures you control
can't attack or block until your next turn.
•Koala, Toxic Traveller phases out.
"Begone!"