Otto, Idle Giant

Defender (This creature can't attack.)

Whenever Otto, Idle Giant blocks, put a diet
counter on it.
Whenever a Food token you control is sacrificed,
remove a diet counter from Otto, Idle Giant.
Otto, Idle Giant gets -0/-1 for each diet counter on it.

As long as Otto, Idle Giant has at least one
diet counter on it, activated abilities of Food tokens
you control cost {1} less to activate.