Raging River (CE) [Collectors’ Edition] Human Set: Commander 2014 Type: Legendary

Set: Commander 2014 Type: Legendary Creature — Elf Warrior Rare Cost: {1}{G}{G} {G}: Regenerate another target Elf

Set: Amonkhet Invocations Type: Enchantment Mythic Cost: {2}{R} Nonbasic lands are Mountains

you don't need it

you may put that many +1/+1 counters on target creature

Whenever Omnath

Raging River (CE) [Collectors’ Edition] Human Set: Commander 2014 Type: LegendarySet: Collectors Edition Type: Enchantment Rare Cost: {R}{R} Whenever one or more creatures you control attack, each defending player divides all creatures without flying they control into a "left" pile and a "right" pile. Then, for each attacking creature you control, choose "left" or "right." That creature can't be blocked this combat except by creatures with flying and creatures in a pile with the chosen label.