While Snow Mercy only gives those creatures counters, you can use Snow Mercy to tab down those creatures, and the fun part here comes with how you activated that ability because you have to tap, then untap, then tap, then untap, then tap Snow Mercy
List card included in 20% of Play Boosters Configuration: - 14 Cards per Pack
Standard accommodates both best-of-three (players play three games, with the winner of two matches taking final victory) matches with a 15-card sideboard and best-of-one games with a reduced 7-card sideboard
Equipment and fortifications can be attached to other permanents you control and have abilities that allow you to attach them, some even create a creature so you get a token to carry the tool
For example, if you gained 3 life and lost 3 life earlier in the turn, you'll create three tapped 3/3 green Treefolk creature tokens, then put a reach counter on each of them