1-block jump

Parkour rating 1 (parkour rating is never lowered, even when transformed or destroyed. Proliferate works)
If 1-block jump’s Parkour rating is ever higher
than 1, transform it into 1-block vertical jump
{1}{t}, sacrifice 1-block jump: put a +1/+1
counter on target creature.
1-block jump cannot be apart of your
starting deck.