Jurin, Leading the Charge

Trample

Whenever this creature attacks, it gets +3/+0 until end of turn for each other attacking Beast.

Flying

: This creature gets +1/+0 until end of turn.

Whenever this creature deals combat damage to a player, you may have it deal that much damage to target creature that player controls.

Menace

Whenever this creature enters or attacks, create two 1/1 black Rat creature tokens with "This token can't block." Then if you control five or more Rats, each Rat you control gets +2/+0 until end of turn.

Whenever a player attacks, add six . Until end of combat, you don't lose this mana as steps end.

: Target creature gets +3/+0 until end of turn.

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)

Whenever this creature attacks, for each attacking modified creature you control, create a tapped and attacking token that's a copy of that creature. Exile those tokens at end of combat. (Equipment, Auras you control, and counters are modifications.)

Haste

Whenever a Samurai or Warrior you control attacks alone, it gets +1/+0 until end of turn for each Samurai or Warrior you control.