+burr (16)
Sacrifice Burr Grafter: Target creature gets +2/+2 until end of turn.
Soulshift 3 (When this creature dies, you may return target Spirit card with mana value 3 or less from your graveyard to your hand.)
Flying
Reinforce 2— (, Discard this card: Put two +1/+1 counters on target creature.)
Protection from red
Sacrifice Burrenton Forge-Tender: Prevent all damage a red source of your choice would deal this turn.
Whenever Burrenton Shield-Bearers attacks, target creature gets +0/+3 until end of turn.
Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, target creature an opponent controls gets -1/-0 until end of turn.
Trample
Burrowguard Mentor's power and toughness are each equal to the number of creatures you control.
Enchant creature
Enchanted creature has mountainwalk. (It can't be blocked as long as defending player controls a Mountain.)
When Burrowing Razormaw dies, mill four cards. (Put the top four cards of your library into your graveyard.)
, , Tap two untapped red creatures you control: Crackleburr deals 3 damage to any target.
, , Untap two tapped blue creatures you control: Return target creature to its owner's hand. ( is the untap symbol.)
Vigilance
Faeburrow Elder gets +1/+1 for each color among permanents you control.
: For each color among permanents you control, add one mana of that color.
Deathtouch
Whenever Flesh Burrower attacks, another target creature you control gains deathtouch until end of turn.
: Add .
, : Target Goblin creature gets +2/+0 until end of turn.
Choose up to five worth of modes. You may choose the same mode more than once.
— Create a 1/1 white Rabbit creature token.
— Exile target nonland permanent. Its controller draws a card.
— Return target permanent card with mana value 3 or less from your graveyard to the battlefield with an indestructible counter on it.
2 — Bushido 2 (Whenever this creature blocks or becomes blocked, it gets +2/+2 until end of turn.)
3 — Double strike
2 — 2/4
4 — 5/6
Offspring (You may pay an additional as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)
Whenever an opponent casts a noncreature spell, put a +1/+1 counter on this creature.
Whenever Stubborn Burrowfiend becomes saddled for the first time each turn, mill two cards, then Stubborn Burrowfiend gets +X/+X until end of turn, where X is the number of creature cards in your graveyard.
Saddle 2 (Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)
Gatherer works better in the Companion app!