mtg numbered cards What does this number mean? : r/mtg Quick question about serialized cards

More and more counter-Shock

(If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.) If Maester Seymour is no longer on the battlefield when its first ability resolves, use its power as it last existed on the battlefield to determine how many +1/+1 counters to put on the target creature

Answers I am running every feasible mass removal spell in Black that does cost too much mana, and the best one is this 4-drop color-shifted Wrath of God

#FF3 A new type of land debuts in #MTGxFINALFANTASY: Towns

Illustrated by Cliff Childs Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp

How free-to-play is MTG Arena