Splinter, the Forgotten Elder

When Splinter, the Forgotten Elder enters the battlefield, create 2 1/1 green Plant Spirit
creature tokens, then put a +1/+1 counter on
each plant and each other treefolk you control.
{1}{g}: Plants and treefolk you control get +1/+1
and gain your choice of vigilance, trample, or
reach until end of turn. Activate this ability only
once each turn.