Helm of the Host

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) Whenever an opponent casts a noncreature spell with mana value less than this creature's power, draw a card.

This land enters tapped. When this land enters, return a land you control to its owner's hand. T: Add RG.

This land enters tapped. T: Add G. T: Put a +1/+1 counter on each green creature that entered this turn.

Choose one or more — • Destroy target artifact. • Destroy target creature. • Destroy target enchantment. • Destroy target land. • Destroy target planeswalker.

This land enters tapped. T: Add R or G. 2RG: Until end of turn, this land becomes a 3/3 red and green Elemental creature with "Whenever this creature attacks, put a +1/+1 counter on it." It's still a land.

If you would create a Clue, Food, or Treasure token, instead create one of each.

Destroy all creatures with power 3 or greater.

When this artifact enters, draw three cards. T: Add three mana of any one color. Whenever one or more creatures an opponent controls attack you and aren't blocked, that player draws three cards and gains control of this artifact. Untap it.