Whenever Assembled Alphas blocks or becomes blocked by a creature, Assembled Alphas deals 3 damage to that creature and 3 damage to that creature's controller.

All creatures able to block Breaker of Armies do so.

Whenever Engulfing Slagwurm blocks or becomes blocked by a creature, destroy that creature. You gain life equal to that creature's toughness.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Whenever Ichorclaw Myr becomes blocked, it gets +2/+2 until end of turn.

Whenever Imaryll, Elfhame Elite attacks, it gets +X/+X until end of turn, where X is the number of other Elves you control. You may have Imaryll assign its combat damage as though it weren't blocked.

All creatures able to block Prized Unicorn do so.

Deathtouch, indestructible Rhonas the Indomitable can't attack or block unless you control another creature with power 4 or greater. {2}{G}: Another target creature gets +2/+0 and gains trample until end of turn.

Hexproof As long as Siege Behemoth is attacking, for each creature you control, you may have that creature assign its combat damage as though it weren't blocked.

{R}{G}: Each blocked creature gets +1/+0 and gains trample until end of turn.

All creatures able to block Taunting Elf do so.

You may have Thorn Elemental assign its combat damage as though it weren't blocked.

All creatures able to block Treeshaker Chimera do so. When Treeshaker Chimera dies, draw three cards.

All creatures block each combat if able. The attacking player chooses how each creature blocks each combat.

Enchant creature All creatures able to block enchanted creature do so.

Creatures you control have "Whenever this creature becomes blocked by a creature, this creature gets +1/+1 until end of turn."

Untap all creatures. Until end of turn, whenever a creature an opponent controls blocks, draw a card. Draw a card.

Cast this spell only before combat or during combat before blockers are declared. Roll two d20 and ignore the lower roll. 1—14 | Choose any number of creatures. They block this turn if able. 15—20 | You choose which creatures block this turn and how those creatures block.

All creatures able to block target creature this turn do so.

Target creature or land you control becomes a 4/4 Elemental creature with haste in addition to its other types until end of turn. It must be blocked this turn if able.

Target creature gets +3/+3 until end of turn. All creatures able to block it this turn do so.

Target creature gets +7/+7 and gains trample until end of turn. It must be blocked this turn if able. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)

Creatures you control get +2/+2 until end of turn. Whenever a creature blocks this turn, its controller gets a poison counter.

Creatures you control get +3/+3 until end of turn. Each creature your opponents control blocks this turn if able.

Until end of turn, target creature gets +6/+6 and gains trample, and all creatures able to block it this turn do so. Miracle {G} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

All creatures able to block target creature this turn do so. Ferocious — That creature gains indestructible until end of turn if you control a creature with power 4 or greater.