Case of the Trampled Garden - 2G
Enchantment - Case (Uncommon)
When this Case enters the battlefield, distribute two +1/+1 counters among one or two target creatures you control.
To solve - Creatures you control have total power 8 or greater. (If unsolved, solve at the beginning of your end step.)
Solved - Whenever you attack, put a +1/+1 counter on target attacking creature. It gains trample until end of turn.
Unfortunately, I don’t find this too exciting in a constructed world. Maybe in limited it’ll see use, but it’s really not doing much for the board state.
Another option for a Yargle deck.