Boros Challenger - The List (PLIST) C19 Colorless creatures you control get

Colorless creatures you control get +2/+2

The warriors fought against the paralyzing waves until even their thoughts froze in place

it wields a sword with deadly skill

it becomes an Aura with "enchant creature put onto the battlefield with Necromancy

that player chooses target player who controls more creatures than they do and is their opponent

Boros Challenger - The List (PLIST) C19 Colorless creatures you control getMentor (Whenever this creature attacks, put a +1 +1 counter on target attacking creature with lesser power.) {2}{R}{W}: Boros Challenger gets +1 +1 until end of turn. "Send your champion. I could use a light workout."