Helm of the Host

At the beginning of combat on your turn, create a token that's a copy of equipped creature, except the token isn't legendary. That token gains haste.
Equip {5}

The Sixth Doctor

Time Lord's Prerogative — Whenever you cast a historic spell, copy it, except the copy isn't legendary. This ability triggers only once each turn. (Artifacts, legendaries, and Sagas are historic. A copy of a permanent spell becomes a token.)

Thrun, Breaker of Silence

This spell can't be countered.
Trample
Thrun, Breaker of Silence can't be the target of nongreen spells your opponents control or abilities from nongreen sources your opponents control.
During your turn, Thrun has indestructible.

Mana Reflection

If you tap a permanent for mana, it produces twice as much of that mana instead.