Sentinel Sliver

+1: Put a +1/+1 counter on up to one target creature. −3: Target creature gains flying and double strike until end of turn. −8: Create X 2/2 white Cat creature tokens, where X is your life total.

Whenever an enchantment you control enters, create a 2/2 white Cat creature token. If that enchantment is an Aura, you may attach it to the token.

At the beginning of each end step, if you gained 4 or more life this turn, create a 4/4 white Angel creature token with flying.

Defender (This creature can't attack.) Flying

Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.) Whenever you gain life, put a +1/+1 counter on each creature you control.

When this creature enters, you may return target enchantment card from your graveyard to your hand.

When this creature enters, exile target creature an opponent controls until this creature leaves the battlefield.

Enchant creature W: Enchanted creature gets +1/+1 until end of turn.