Urza's Legacy

Destroy target creature with power 4 or greater. Cycling {2} ({2}, Discard this card: Draw a card.)

When an opponent casts a creature spell, if Opal Champion is an enchantment, Opal Champion becomes a 3/3 Knight creature with first strike.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Protection from artifacts

Echo {2}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay ...

{T}: Target creature gains forestwalk until end of turn. (It can't be blocked as long as defending player controls a Forest.)

Whenever Treefolk Mystic blocks or becomes blocked by a creature, destroy all Auras attached to that creature.

Flash Echo {2}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless yo...

Target creature gets +1/+1 and gains reach until end of turn. (It can block creatures with flying.)

Shuffle all creature cards from target player's graveyard into that player's library. Cycling {2} ({2}, Discard this card: Draw a card.)

Enchant creature Enchanted creature gets +2/+0 and has trample. When Rancor is put into a graveyard from the battlefield, return Rancor to its ow...

Echo {G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay ...

Target creature gets +0/+4 until end of turn. Cycling {2} ({2}, Discard this card: Draw a card.)

Flying, protection from artifacts