Thistledown Duo

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Counter target blue instant spell.

Blue creatures you control can't be blocked.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) 2UB: Each unblocked creature has base power and toughness 4/1 until end of turn.

(2/G can be paid with any two mana or with G. This card's mana value is 6.) Until end of turn, target creature gets +4/+4 and gains trample, wither, and "When this creature attacks, target creature blocks it this turn if able." (It deals damage to creatures in the form of -1/-1 counters.)

Enchant creature As long as enchanted creature is red, it gets +1/+1 and has double strike. (It deals both first-strike and regular combat damage.) As long as enchanted creature is green, it gets +1/+1 and has trample.

Destroy all Auras and Equipment attached to target creature.

T: Prevent the next 1 damage that would be dealt to any target this turn. Put a -1/-1 counter on this creature: Untap this creature.